Adaptive Biophilic Infrastructure and Resource Governance in Post-War Ukrainian Cities

Abstract

Contemporary post-war cities increasingly require adaptive urban systems capable of addressing climate vulnerability, infrastructural instability, environmental degradation, and human well-being simultaneously. This study develops an interdisciplinary framework for adaptive biophilic infrastructure and resource governance within the context of sustainable post-war reconstruction in Ukraine. The research combines literature analysis, comparative urban assessment, and experimental evaluation of eco-modified construction materials. Particular attention is given to vertical greening systems, adaptive underground infrastructure, daylight-integrated public environments, multifunctional urban systems, and environmentally responsive concrete composites incorporating porous minerals and plant-based biomass. Comparative examples from Montreal, New York, Seoul, and Singapore are examined alongside differentiated Ukrainian urban contexts, including Kyiv, Kharkiv, Dnipro, Odesa, Kherson, Lviv, and Uzhhorod. The findings demonstrate that adaptive biophilic infrastructure may improve urban microclimates, strengthen thermal and acoustic regulation, enhance infrastructural adaptability, and support psycho-emotional comfort within dense and post-conflict urban environments. The study further indicates that underground and layered urban systems increasingly function as multifunctional socio-ecological infrastructures integrating mobility continuity, environmental regulation, public accessibility, emergency protection, and human-centered spatial resilience. The experimental assessment demonstrates that eco-modified materials contribute to moisture stabilization, thermal buffering, acoustic moderation, and passive environmental regulation within adaptive urban systems. The incorporation of porous mineral additives and plant biomass improved the environmental responsiveness of the investigated composites while supporting more resource-efficient construction approaches. The study concludes that sustainable post-war reconstruction requires a transition from fragmented technological interventions toward integrated socio-ecological urban frameworks capable of combining environmental regulation, infrastructural resilience, resource efficiency, adaptive governance, and human-centered spatial design within long-term urban sustainability strategies.

1. Introduction

Contemporary cities increasingly face interconnected pressures arising from climate variability, rapid urbanization, environmental degradation, infrastructural vulnerability, geopolitical instability, and socio-economic uncertainty. Urban systems can no longer be viewed as static spatial arrangements composed solely of buildings, transportation networks, and functionally separated districts. Instead, cities are increasingly understood as dynamic socio-ecological systems in which environmental processes, infrastructure, governance, and human activities interact across multiple scales [1,2,3]. This shift reflects a broader transition from traditional industrial urbanism toward more adaptive and resilient approaches to urban development capable of responding to environmental, infrastructural, and societal change [4].

Rapid urbanization further intensifies these challenges. According to the United Nations Department of Economic and Social Affairs, approximately 56% of the global population currently resides in urban areas, and this figure is projected to increase to nearly 68% by 2050 [5]. Increasing urban density places growing pressure on housing, transportation infrastructure, ecological resources, energy systems, and urban governance [6]. At the same time, twentieth-century planning approaches often prioritized automobile-oriented mobility, zoning separation, and land-use efficiency while giving limited attention to ecological integration and human-centered design [7]. As a result, many contemporary cities experience declining biodiversity, expanding impermeable surfaces, environmental fragmentation, and deteriorating urban microclimates [8,9,10]. Climate change further intensifies these pressures through more frequent heatwaves, flooding, droughts, and infrastructural disruptions, forcing cities to reconsider conventional approaches to urban planning and environmental management [11,12,13,14].

Within this context, adaptive urbanism has emerged as an important framework for understanding contemporary urban transformation. It emphasizes ecological integration, environmental responsiveness, infrastructural flexibility, and adaptive governance rather than relying solely on centralized technical infrastructure and rigid planning systems [15,16,17,18]. At the same time, sustainability transition research views urban resilience as the ability of cities to adapt, reorganize, and maintain essential functions under conditions of uncertainty and disturbance [19,20,21]. Consequently, resilient cities depend not only on robust infrastructure, but also on effective governance, ecological integration, social adaptability, and environmental responsiveness [22,23].

Within this broader resilience discourse, biophilic infrastructure has emerged as an important approach to sustainable urban development. Rooted in the concept of biophilia—the innate human affinity for nature and living systems—biophilic infrastructure integrates ecological processes, vegetation, natural light, and nature-based design strategies into the built environment to enhance environmental performance, urban livability, and resilience [9,24]. Green facades, vertical greening systems, ecological corridors, adaptive landscapes, natural ventilation systems, and daylight-integrated architecture are increasingly recognized as functional urban infrastructure rather than merely aesthetic interventions [25,26,27]. Research shows that these systems can moderate urban heat accumulation, improve air quality, regulate humidity, support biodiversity, reduce acoustic stress, and strengthen ecosystem services in dense urban environments [9,28,29]. As a result, biophilic infrastructure can help cities improve environmental quality while supporting adaptation and long-term urban sustainability.

The importance of adaptive and biophilic urban systems becomes particularly evident in the context of post-war reconstruction in Ukraine. The continuing consequences of military conflict have reshaped how urban infrastructure, resilience, security, and environmental continuity are understood. Cities must now support not only sustainability and environmental performance, but also civil protection, service continuity, psychological well-being, and adaptation under crisis conditions. As a result, conventional planning approaches focused primarily on technical recovery are increasingly insufficient for addressing the combined challenges of wartime destruction, population displacement, climate change, infrastructural degradation, and socio-economic instability.

These challenges manifest differently across Ukrainian cities. Kyiv increasingly relies on underground systems and continuity planning to maintain essential urban functions, while Kharkiv faces severe infrastructural disruption and ongoing emergency pressures. Dnipro serves as a strategic logistical and medical hub, whereas Odesa confronts vulnerabilities associated with maritime infrastructure and environmental uncertainty. Kherson highlights the importance of hydro-ecological recovery following severe environmental disruption and water-system instability, while regional centers such as Lviv and Uzhhorod play an important role in accommodating population movements and supporting decentralized recovery initiatives.

Consequently, post-war Ukrainian cities require reconstruction approaches that integrate ecological sustainability, adaptive infrastructure, effective governance, and human-centered urban design. Within this context, underground systems, multifunctional public spaces, ecological corridors, and environmentally responsive construction materials are becoming increasingly important. International examples such as Montreal’s RÉSO underground network, Singapore’s biophilic urban architecture, and multi-level pedestrian systems in Seoul and New York demonstrate how cities can develop infrastructure that simultaneously addresses environmental, social, and operational challenges [30,31,32].

An equally important aspect of sustainable reconstruction concerns environmentally adaptive materials. Research increasingly shows that construction materials can function not only as structural components [33,34], but also as environmental regulators that influence thermal performance, moisture exchange, acoustic buffering, and indoor environmental quality [35,36,37]. Eco-modified composites incorporating porous minerals, plant biomass, and adaptive microstructures therefore offer considerable potential for improving passive climate regulation and resource efficiency in urban infrastructure systems [38,39,40].

Despite growing international interest in sustainable urbanism and post-war reconstruction, important gaps remain in understanding how ecological infrastructure, underground systems, adaptive materials, and governance strategies can be integrated within reconstruction planning. Existing studies often examine green infrastructure, urban resilience, ecological materials, or environmental governance separately, without fully addressing how these elements interact within post-war urban environments [38,41,42,43]. This article addresses this gap by developing an integrated framework for adaptive biophilic infrastructure and resource governance in post-war Ukrainian cities. The study combines literature analysis, comparative urban examples, and experimental assessment of eco-modified building materials to examine how ecological infrastructure, adaptive spatial systems, underground infrastructure, and environmentally responsive materials can support sustainable reconstruction and long-term urban resilience.

The study addresses the following research questions:

• RQ1: How can adaptive biophilic infrastructure contribute to sustainable urban resilience in post-war Ukrainian cities?
• RQ2: In what ways can vertical greening, light-integrated underground systems, and multifunctional urban spaces improve environmental performance and psycho-emotional well-being in dense urban environments?
• RQ3: How can eco-modified building materials support adaptive resource governance through thermal regulation, moisture stabilization, and environmental responsiveness?
• RQ4: What role does integrated resource governance play in connecting ecological infrastructure, resilient urban systems, and sustainable post-war reconstruction?
• RQ5: How can interdisciplinary adaptive urban frameworks support the transition from conventional infrastructure recovery toward long-term socio-ecological resilience?

Accordingly, this article develops an integrated framework for adaptive biophilic infrastructure and resource governance in post-war Ukrainian cities. It examines how ecological infrastructure, adaptive spatial systems, underground infrastructure, and environmentally responsive materials can support sustainable reconstruction and long-term urban resilience. Unlike studies that examine green infrastructure, urban resilience, or adaptive materials separately, the article focuses on how these elements interact within reconstruction processes. In doing so, the study contributes to current debates on sustainability transitions and adaptive urban development by proposing an interdisciplinary framework that links ecological infrastructure, spatial planning, underground systems, and adaptive materials within post-war reconstruction and urban governance.

2. Materials and Methods

2.1. Conceptual Framework

This study is grounded in an interdisciplinary framework that brings together adaptive urbanism, urban resilience, sustainability transitions, biophilic infrastructure, and resource governance within the context of post-war reconstruction. It is based on the premise that contemporary cities should be understood not as static technical entities [38,42], but as dynamic systems in which environmental, infrastructural, technological, political, and human factors interact across multiple scales [1,2,3]. From this perspective, urban sustainability extends beyond environmental performance or technological modernization and includes the long-term capacity of cities to maintain ecological functions, essential services, social stability, and human well-being under conditions of uncertainty and disruption [21].

The study draws on adaptive urbanism, which emphasizes the ability of cities to respond flexibly to environmental, social, technological, and infrastructural change through integrated planning and governance strategies [15,44,45]. Rather than relying solely on centralized engineering systems and rigid planning approaches, adaptive urbanism promotes ecological integration, environmental responsiveness, infrastructural flexibility, and decentralized solutions [16,17]. These principles are particularly relevant in post-war reconstruction, where cities must address infrastructure recovery, population displacement, environmental degradation, resource constraints, and security challenges simultaneously.

The study also draws on sustainability transition theory, which examines long-term changes in infrastructure, governance, mobility, energy systems, and environmental management [19,46]. From this perspective, resilient urban development is not viewed as a single technological solution, but as a broader process involving governance, infrastructure, spatial planning, ecological adaptation, and human behavior [46,47]. Post-war reconstruction is therefore understood as a long-term urban transformation requiring coordinated changes to physical infrastructure, ecological systems, and governance structures in order to support sustainable recovery and resilience.

A central element of the framework is biophilic infrastructure [48,49]. In this study, biophilic infrastructure includes environmental systems such as vertical greening, adaptive landscapes, ecological corridors, daylight-integrated architecture, natural ventilation systems, and adaptive building envelopes that support environmental quality, human well-being, and urban resilience [9,24,25,26,50]. These systems are viewed not simply as environmental enhancements, but as functional components of urban infrastructure that can improve thermal performance, humidity regulation, air quality, acoustic comfort, biodiversity, and overall quality of life in dense urban environments [48,51].

The framework also incorporates principles from socio-ecological systems theory, which highlights the connections between environmental processes, infrastructure, institutions, and human activity [2,52]. From this perspective, urban resilience results from the interaction of ecological adaptation, effective governance, reliable infrastructure, technological innovation, and social capacity to respond to change. Accordingly, the study views urban infrastructure, ecological systems, and construction materials as interconnected parts of broader urban systems rather than as isolated technical components [53].

Within this framework, resource governance refers to the coordinated management of environmental, infrastructural, material, and spatial resources to support long-term urban sustainability and resilience [54]. In post-war reconstruction settings, resource governance also includes coordinating planning priorities, institutional responsibilities, reconstruction investments, and stakeholder participation across different levels of decision-making. As a result, urban resilience depends not only on the availability of resources, but also on the ability of institutions to allocate and manage those resources under conditions of uncertainty and competing development priorities. Accordingly, vertical greening systems, adaptive underground infrastructure, multifunctional public spaces, and environmentally responsive construction materials are viewed not simply as technological interventions, but as interconnected tools that support resilience, sustainability, and effective reconstruction.

The framework further assumes that post-war reconstruction requires a shift from fragmented and reactive rebuilding toward more integrated urban systems that support environmental quality, social recovery, service continuity, and resource efficiency. Particular emphasis is placed on adaptive underground infrastructure, multifunctional public spaces, and eco-modified construction materials that can respond to changing urban and environmental conditions.

Overall, the framework positions adaptive biophilic infrastructure as an important component of urban resilience in post-war cities. By bringing together adaptive urbanism, socio-ecological systems theory, sustainability transitions, resilience thinking, and biophilic design, the study provides an interdisciplinary foundation for examining how ecological infrastructure, spatial planning, adaptive materials, and effective governance can contribute to sustainable reconstruction and long-term urban resilience in Ukraine. Figure 1 illustrates the integrated framework developed in this study, linking adaptive urbanism, biophilic infrastructure, socio-ecological resilience, underground urban systems, adaptive materials, and sustainability transitions within post-war reconstruction contexts.

2.2. Comparative Urban Case Analysis

This study applies an exploratory comparative urban analysis to examine how adaptive biophilic infrastructure and resource governance strategies operate across different urban contexts. Comparative urban methodologies and systems-oriented analytical approaches are increasingly used in interdisciplinary sustainability research to identify transferable adaptive principles across complex socio-technical systems [55,56,57]. In this study, comparative analysis is used not to establish direct equivalence between urban cases, but to identify adaptive mechanisms and infrastructural strategies relevant to sustainable reconstruction in post-war Ukrainian cities.

The selected urban examples were identified according to four analytical criteria: (1) integration of ecological infrastructure within broader urban systems; (2) adaptive reuse and multifunctional spatial organization; (3) contribution to environmental regulation and human well-being; and (4) relevance to resilience-oriented urban transformation. Based on these criteria, the study examines projects and infrastructural systems from Montreal, New York, Seoul, and Singapore alongside differentiated Ukrainian urban contexts including Kyiv, Kharkiv, Dnipro, Odesa, Kherson, Lviv, and Uzhhorod.

Montreal’s RÉSO was selected as an example of integrated underground infrastructure supporting climatic continuity, mobility, and multifunctional urban accessibility within dense metropolitan environments [30,31,58]. The High Line in New York illustrates adaptive ecological reuse through the transformation of obsolete transport infrastructure into multifunctional public and ecological space [8,32,59,60]. Similarly, Seoullo 7017 in Seoul demonstrates the potential of layered pedestrian infrastructure integrating mobility, ecological connectivity, and public accessibility within compact urban environments [31,61,62]. Singapore represents a leading example of integrated biophilic urbanism through projects combining ecological infrastructure, daylight optimization, environmental regulation, and multifunctional public space within highly dense metropolitan systems [63,64].

Alongside these international examples, the study examines Ukrainian cities facing different reconstruction challenges and resilience needs. Kyiv highlights the importance of underground continuity systems within a large metropolitan area, while Kharkiv reflects the effects of prolonged conflict, infrastructural disruption, and emergency adaptation. Dnipro serves as a key logistical and public-service hub, whereas Odesa faces challenges associated with maritime infrastructure and environmental uncertainty. Kherson illustrates the need for hydro-ecological recovery following severe infrastructural damage, while Lviv and Uzhhorod represent more decentralized and regionally focused reconstruction approaches.

The comparative analysis is exploratory and interpretive rather than quantitative. The selected examples are used to identify recurring principles related to ecological integration, multifunctional infrastructure, environmental quality, spatial connectivity, human well-being, and urban resilience across different climatic and socio-political settings. The analysis also considers governance-related factors, including planning approaches, institutional coordination, and resource-management practices relevant to post-war reconstruction. The purpose of the selected cases is therefore not to establish performance rankings, economic benchmarks, lifecycle costs, or direct comparisons between cities, but rather to identify transferable lessons, implementation pathways, and context-sensitive strategies that may support reconstruction efforts. Consequently, the study does not evaluate the relative economic feasibility, implementation costs, or local adaptability of the selected international examples. Conclusions regarding transferability should therefore be interpreted as conceptual and exploratory rather than as direct implementation recommendations. This perspective aligns with emerging approaches to sustainability assessment that emphasize integrated urban functionality and overall sustainability performance within complex urban systems [65]. Figure 2 presents the comparative framework developed in this study, linking transferable international infrastructure principles with differentiated Ukrainian reconstruction contexts.

Table 1. Comparative adaptive urban resilience characteristics across international and Ukrainian urban contexts.

Urban Context	Primary Adaptive Function	Infrastructure Type	Ecological Integration	Resilience Contribution	Reconstruction Relevance
Montreal	Underground continuity	Subterranean systems	Moderate	Climatic continuity	Underground resilience
New York	Adaptive ecological reuse	Elevated infrastructure	High	Public-space regeneration	Adaptive reuse
Seoul	Layered pedestrian mobility	Multi-level mobility	High	Connectivity resilience	Pedestrian adaptation
Singapore	Integrated biophilic systems	Environmental infrastructure	Very high	Environmental regulation	Human-centered resilience
Kyiv	Underground metropolitan resilience	Metro/shelter systems	Moderate	Civil continuity	Post-war underground adaptation
Kharkiv	Frontline infrastructural adaptation	Emergency infrastructure	Moderate	Urban continuity	Crisis resilience
Dnipro	Logistical continuity	Adaptive public systems	Moderate	Operational continuity	Regional stabilization
Odesa	Maritime resilience	Port infrastructure	Moderate	Strategic continuity	Coastal vulnerability
Kherson	Hydro-ecological recovery	Water systems	High	Environmental recovery	Ecological resilience
Lviv	Demographic adaptation	Public/social infrastructure	Moderate	Social resilience	Displacement adaptation
Uzhhorod	Regional adaptive reconstruction	Scalable urban systems	Moderate	Decentralized resilience	Scalable reconstruction

summarizes the principal adaptive characteristics and resilience functions identified across the analyzed examples.

Overall, the comparative urban analysis supports the study’s conceptual framework by demonstrating that biophilic infrastructure functions not as an isolated architectural intervention, but as part of broader urban systems. Collectively, the selected cases show how ecological infrastructure, spatial planning, layered urban networks, and multifunctional public spaces can contribute to resilient and people-centered urban development under conditions of environmental and geopolitical uncertainty.

2.3. Experimental Assessment of Eco-Modified Materials

The experimental component of this study focused on the assessment of eco-modified concrete composites designed to improve the environmental adaptability and microclimatic performance of urban infrastructure systems [40,63]. The analysis was conducted within the broader conceptual framework of adaptive urban resilience, in which construction materials are interpreted not solely as passive structural elements [66], but as active environmental regulators capable of contributing to thermal stability, moisture control, acoustic comfort, and resource-efficient urban development [35,36]. Within this perspective, the experimental assessment aimed to examine how natural mineral additives and plant-based inclusions influence the physical, mechanical, and environmental properties of concrete composites applicable to sustainable urban reconstruction [67].

The investigated concrete compositions incorporated a range of natural and secondary components, including natural zeolite, wood particles, plant biomass, and crushed hogweed (Heracleum) [66,68,69,70]. These materials were selected due to their porous microstructural characteristics, hygroscopic behavior, moisture sorption capacity, and potential contribution to environmentally adaptive construction systems. Particular attention was given to natural zeolite because of its high specific surface area, porous crystalline structure, and ion-exchange properties, which facilitate moisture accumulation and gradual humidity regulation within indoor environments [71,72,73]. Previous research additionally demonstrates that porous mineral systems may improve thermal inertia and passive environmental regulation within construction materials [37,74,75]. Similarly, plant-based inclusions were examined for their capacity to modify capillary structures, reduce thermal conductivity, improve acoustic buffering, and enhance the hygroscopic behavior of composite materials [76,77,78].

The experimental studies were conducted under both laboratory conditions and within the industrial production environment of TOV “Doronik-Ukraine”, allowing the assessment of material performance under practical construction conditions. This combined laboratory–industrial approach was used to evaluate not only the environmental properties of eco-modified composites, but also their technological feasibility and compatibility with conventional construction processes. Such an approach is particularly relevant in post-war reconstruction, where sustainable materials must remain both economically feasible and practically applicable.

Several physical and mechanical parameters were evaluated during the experimental assessment. Compressive strength testing was performed using a CONTROLS 50-C56P02/PILOT PRO COMPACT-Line automatic compression machine (3000 kN capacity), manufactured by CONTROLS S.p.A., Liscate (MI), Italy, designed for cylinders up to 160 × 320 mm and cubes up to 200 mm, conforming to EN 12390-4 standard [79]. Additional tests included Schmidt hammer testing for surface strength, Abrams cone testing for workability, water permeability analysis, and thermogravimetric analysis to evaluate material behavior under varying thermal conditions. Together, these methods enabled the assessment of both conventional mechanical properties and environmental characteristics related to porosity, moisture exchange, and thermal performance.

The experimental program examined the influence of porous and plant-based inclusions on the internal capillary structure of concrete composites. Particular attention was given to crushed hogweed biomass incorporated at different concentrations within the concrete mixtures. The fibrous structure of the biomass promoted the formation of fine capillary networks and microporous structures within the hardened material matrix. These changes were analyzed in relation to moisture retention, density reduction, thermal inertia, water absorption, and overall environmental performance. The study also evaluated how increased porosity affected both compressive strength and passive environmental regulation.

The environmental assessment focused on the contribution of the materials to passive indoor climate regulation and sustainable urban infrastructure. Evaluated properties included thermal buffering capacity, moisture stabilization, acoustic moderation, and performance under fluctuating humidity and temperature conditions. Rather than viewing these materials solely as construction products, the study considers eco-modified composites as potential components of adaptive urban infrastructure that can support improved environmental performance and resource efficiency.

The methodological approach adopted in this study is interdisciplinary, combining experimental material analysis with broader perspectives on urban resilience and environmental adaptation. The objective is not to develop a specialized engineering optimization model, but to examine how environmentally responsive materials may contribute to adaptive urban infrastructure within post-war reconstruction contexts. By linking material experimentation with urban systems analysis, the study seeks to connect sustainable construction technologies with broader strategies for resilient urban development.

3. Results

3.1. Adaptive Biophilic Infrastructure and Urban Environmental Regulation

The comparative urban analysis and environmental assessment demonstrate that biophilic infrastructure plays an increasingly important role in contemporary cities. Unlike conventional urban development approaches, where ecological features were often treated as aesthetic additions or isolated landscaping elements, the analyzed examples show a broader shift toward integrating ecological systems into urban infrastructure. These systems can contribute to thermal regulation, humidity control, acoustic comfort, biodiversity, environmental quality, and human well-being. The findings support growing evidence that ecological systems function as active components of urban infrastructure rather than merely decorative enhancements [2,8].

One of the most significant findings concerns the role of vertical greening systems in dense urban environments. Comparative analysis of green facades and vegetated building envelopes demonstrates their ability to reduce wall surface temperatures, improve local humidity conditions, mitigate urban heat accumulation, and support passive climate regulation. Previous studies indicate that vertical greening systems may reduce facade surface temperatures by approximately 2–4 °C while contributing to solar shading, evapotranspiration cooling, localized microclimate improvement, and noise reduction [31,80,81]. These effects help alleviate thermal stress in highly urbanized areas characterized by extensive impermeable surfaces and limited vegetation.

The findings also indicate that vertical greening systems contribute to psychological comfort and environmental quality in urban areas affected by traffic, environmental stress, and spatial fragmentation. Integrating vegetation into buildings improves visual continuity, perceived environmental quality, and human interaction with urban space. These observations support biophilic design research showing that nature-based elements within the built environment can promote cognitive restoration, emotional well-being, and stress reduction [24,28]. As a result, vertical greening systems provide both environmental and social benefits within contemporary urban environments.

Adaptive facade systems and building envelopes also offer considerable potential for improving environmental performance in dense urban areas. The comparative analysis shows that multilayer facades, dynamic shading systems, vegetated building skins, and other adaptive designs can reduce solar heat gain, improve daylight management, and enhance thermal performance within buildings. Rather than serving solely as architectural surfaces, these systems can respond to changing climatic conditions and reduce reliance on energy-intensive environmental controls [16]. As a result, they contribute to more efficient and adaptable urban buildings.

The analyzed urban examples further demonstrate the value of multi-level ecological infrastructure. Projects such as the High Line in New York, Seoullo 7017 in Seoul, and Singapore’s integrated biophilic pedestrian networks show how transportation and public spaces can be transformed into ecological corridors that combine mobility, recreation, vegetation, biodiversity, and social interaction [31,32]. These systems improve pedestrian accessibility, strengthen ecological connections, and enhance environmental quality within dense urban environments. In addition, the adaptive reuse of underutilized infrastructure reduces the need for extensive new construction while supporting more resource-efficient forms of urban development. Figure 3 illustrates these ecological mobility systems and demonstrates how layered pedestrian networks, ecological integration, and multifunctional public spaces can contribute to resilient and people-centered cities.

The results also highlight the importance of daylight-integrated urban systems in improving environmental quality and human well-being within enclosed and high-density urban environments. Observations from projects incorporating large-scale daylight access demonstrate that natural lighting functions not only as a technical design feature, but also as an important contributor to psychological well-being, spatial orientation, and overall user experience. The integration of daylight into enclosed or subterranean spaces can reduce feelings of isolation, improve spatial awareness, and enhance comfort. In this regard, daylight-integrated systems should be viewed as important components of biophilic infrastructure rather than solely architectural or technological features. Their effectiveness also depends on appropriate vegetation selection based on light availability, water requirements, maintenance needs, growth characteristics, and local climatic conditions.

Particularly important in post-war reconstruction is the growing role of multifunctional public infrastructure. The findings suggest that contemporary cities increasingly require spaces capable of serving environmental, social, protective, psychological, and infrastructural functions at the same time. Under conditions of uncertainty and geopolitical instability, biophilic systems can contribute not only to environmental sustainability, but also to urban continuity, social cohesion, psychological recovery, and long-term well-being. The integration of ecological corridors, adaptive public spaces, vertical greening systems, and daylight-integrated environments therefore reflects a broader shift toward more resilient and adaptable urban environments.

The comparative analysis also demonstrates that ecological infrastructure can support sustainable urban development through passive climate regulation and decentralized management approaches. Ecological systems integrated into urban infrastructure contribute to thermal moderation, humidity control, biodiversity support, and local climate adaptation while reducing reliance on energy-intensive environmental control systems. These findings align with broader sustainability research emphasizing the importance of adaptive and environmentally integrated infrastructure in long-term urban development [19,20,82].

Overall, the results demonstrate that biophilic infrastructure serves as an important component of urban environmental management rather than a collection of isolated ecological interventions. Across the analyzed examples, ecological systems consistently contribute to thermal moderation, environmental quality, human well-being, and urban resilience. These findings reinforce the argument that sustainable post-war reconstruction requires ecological infrastructure to be integrated into broader urban planning and resilience strategies that support environmental performance, service continuity, and long-term quality of life.

3.2. Underground Urban Systems and Post-War Resilience

The comparative urban analysis demonstrates that underground and multi-level urban systems are playing an increasingly important role in urban resilience, particularly under conditions of infrastructural instability, climate-related pressures, environmental stress, and geopolitical uncertainty. Traditionally associated with transportation networks, utility corridors, storage facilities, and technical infrastructure, subterranean spaces are increasingly being adapted to support mobility, environmental management, public space, commercial activity, and civil protection [31]. In post-war reconstruction, these functions become especially important because underground systems can simultaneously enhance safety, maintain essential services, support environmental performance, and improve long-term urban adaptability.

The Montreal RÉSO underground network represents one of the most developed examples of underground urban infrastructure adapted to challenging climatic conditions [30]. Originally created in response to severe winters, the system evolved into an interconnected network of transportation links, pedestrian corridors, commercial spaces, public facilities, and environmental control systems. The findings indicate that such environments can reduce exposure to harsh weather while maintaining pedestrian mobility, comfort, and access to essential services throughout the year. Importantly, the Montreal case demonstrates that underground systems can function not only as technical or emergency infrastructure, but also as permanent and active components of urban life.

Within the Ukrainian context, Kyiv provides a contemporary example of underground infrastructure serving both transportation and emergency shelter functions during periods of geopolitical instability. The integration of mobility, civil protection, and public accessibility within Kyiv’s metro system demonstrates how underground spaces can support both everyday urban life and emergency response. Similar challenges are increasingly evident in cities such as Kharkiv and Dnipro, where maintaining essential services and public infrastructure has become a key priority under conditions of uncertainty and disruption.

In post-war Ukrainian cities, the role of underground infrastructure extends beyond climate adaptation to include civil protection, urban continuity, and public safety during crises. The continuing military conflict has reshaped perceptions of urban safety, infrastructure, and spatial vulnerability. As a result, underground spaces increasingly combine shelter functions, public access, logistical support, and essential services. The findings suggest that reconstruction strategies should view underground infrastructure not simply as emergency facilities, but as long-term components of urban development capable of supporting cities during periods of instability and disruption.

A particularly important finding concerns the integration of natural lighting and biophilic design elements within subterranean environments. Comparative observations indicate that conventional underground spaces can contribute to feelings of isolation, discomfort, and disorientation due to the limited presence of natural environmental features. In contrast, underground environments incorporating daylight access, vegetation, adaptive ventilation, and open spatial layouts demonstrate improved comfort, spatial awareness, and user experience. These findings support broader research showing that daylight and biophilic design can enhance psychological well-being, support cognitive restoration, and reduce stress in enclosed environments [24,28]. Consequently, daylight-integrated underground spaces should be viewed not solely as technical infrastructure, but also as environments that can improve user well-being during extended periods of enclosure and uncertainty. Figure 4 illustrates the proposed adaptive underground urban model integrating environmental management, multifunctional public infrastructure, mobility, civil protection, and human well-being within post-war urban environments.

The results further indicate that multifunctional underground systems can strengthen urban resilience by increasing flexibility and supporting a range of functions within dense urban environments. Underground spaces may accommodate pedestrian movement, emergency shelters, public gathering areas, logistical operations, environmental buffering, and essential services within a limited urban footprint. This multifunctionality is particularly valuable in post-war reconstruction, where land-use pressures, infrastructural damage, population displacement, and economic constraints limit opportunities for expanding surface-level infrastructure. In this context, underground development can increase urban capacity while preserving ecological corridors, public spaces, and environmental amenities at ground level.

The comparative analysis also demonstrates the importance of linking underground systems with broader ecological infrastructure and urban planning strategies. The most resilient examples examined in this study are characterized not by isolated shelters, but by interconnected systems that combine mobility infrastructure, environmental management, ecological continuity, and public space. These findings align with broader resilience research emphasizing the integration of infrastructure, governance, environmental adaptation, and social capacity [2,3]. Consequently, successful underground urban development depends on coordination among architecture, engineering, ecological infrastructure, and urban planning.

Within the Ukrainian reconstruction context, underground strategies are becoming increasingly relevant across different cities and scales. Kyiv demonstrates the importance of integrating transportation infrastructure, emergency shelter functions, and public accessibility during periods of instability. Kharkiv illustrates the challenges of frontline adaptation, where underground infrastructure supports civil protection and continuity of urban services under repeated disruption. Dnipro highlights the importance of logistical support, while Odesa underscores the need for adaptive infrastructure in environmentally vulnerable coastal areas. In smaller cities such as Lviv and Uzhhorod, adaptive basement systems, multifunctional corridors, and daylight-integrated underground environments may provide flexible and economically feasible solutions without requiring large-scale investments. Collectively, these examples demonstrate that underground development must remain context-sensitive, scalable, and aligned with broader reconstruction priorities. Furthermore, the environmental benefits of biophilic integration in underground environments should not be interpreted as direct extensions of the thermal effects observed in above-ground vertical greening systems. Underground conditions are influenced by site-specific factors including depth, geology, ventilation, occupancy patterns, and infrastructure design. Consequently, the primary value of biophilic integration lies in improving environmental quality, spatial experience, and human well-being while supporting broader resilience objectives.

Another important finding concerns the psychological role of underground infrastructure in post-war environments. Resilience in conflict-affected cities extends beyond physical protection and service continuity to include psychological recovery, environmental comfort, and social cohesion. The integration of natural lighting, vegetation, acoustic buffering, environmental control, and open spatial layouts within underground environments can reduce stress and improve perceptions of safety and comfort. Consequently, underground infrastructure should be designed not only to meet technical protection requirements, but also to support long-term well-being and quality of life.

The results also indicate that underground systems can support sustainable urban development through their multifunctional design and integration with environmental infrastructure. Layered underground spaces may reduce surface congestion, improve environmental conditions, support ecological continuity, and enhance urban adaptability under changing environmental and geopolitical circumstances. These findings align with broader sustainability research emphasizing the importance of flexible and environmentally integrated infrastructure in resilient urban development [19,20].

Overall, the results demonstrate that underground urban systems can serve multiple functions, including environmental management, public accessibility, civil protection, psychological well-being, and continuity of essential services. Rather than functioning solely as emergency or technical infrastructure, subterranean environments can become important components of urban systems that help cities respond to environmental, infrastructural, and geopolitical challenges. These findings reinforce the argument that sustainable post-war reconstruction requires integrated approaches that combine underground infrastructure, ecological systems, effective governance, and people-centered urban design within long-term development strategies.

Importantly, the findings do not suggest that underground infrastructure should replace conventional urban redevelopment or become the dominant model of post-war reconstruction. Rather, underground systems should be viewed as complementary elements of broader urban strategies, providing additional resilience, continuity, and flexibility alongside surface-level ecological, social, and infrastructural interventions. Their successful implementation ultimately depends on local needs, economic feasibility, planning priorities, and public acceptance.

3.3. Performance of Eco-Modified Materials in Adaptive Urban Systems

The experimental assessment of eco-modified concrete composites demonstrates that environmentally adaptive materials may contribute significantly to urban infrastructure through improved thermal regulation, moisture stabilization, environmental responsiveness, and resource efficiency within built environments. The results indicate that the incorporation of natural minerals and plant-based inclusions modifies the internal capillary and porous structure of concrete composites, enabling the materials to perform not only structural functions, but also environmental regulatory functions within urban systems. Within this framework, the investigated materials operate as active components of adaptive socio-ecological infrastructure rather than conventional passive construction elements [35,36].

One of the most significant findings concerns the role of porous mineral additives, particularly natural zeolite, in improving moisture regulation and environmental adaptability within concrete composites. Experimental observations indicate that zeolite-enhanced mixtures demonstrate increased hygroscopic behavior and moisture exchange capacity due to the material’s microporous structure and ion-exchange properties [71,72]. These characteristics contribute to improved humidity stabilization and passive indoor climate regulation under fluctuating atmospheric conditions. Previous studies additionally suggest that porous mineral systems may improve thermal buffering and environmental responsiveness while reducing dependence on mechanically intensive environmental control systems [37]. Consequently, mineral inclusions may contribute to more energy-efficient and adaptive urban infrastructures.

The results additionally demonstrate that plant-based inclusions significantly influence the internal morphology and environmental performance of concrete composites. Mixtures incorporating crushed hogweed biomass and wood particles exhibited the formation of fine capillary networks and increased microporosity within the hardened material matrix. These structural modifications contributed to reduced material density, improved thermal inertia, enhanced moisture absorption, and gradual vapor exchange, thereby supporting more stable environmental conditions within enclosed urban environments. Figure 5 illustrates the environmental performance mechanisms of eco-modified concrete composites and their integration within adaptive socio-ecological urban systems, while

Table 2. Environmental and Adaptive Performance Characteristics of Eco-Modified Concrete Composites.

Material Component	Functional Role	Environmental Contribution	Adaptive Performance Characteristic	Urban Sustainability Relevance
Natural zeolite	Porous mineral additive	Moisture stabilization	Hygroscopic regulation	Passive climate control
Wood particles	Biomass inclusion	Thermal moderation	Reduced thermal conductivity	Energy efficiency
Hogweed biomass	Capillary modifier	Moisture exchange	Microporous regulation	Environmental responsiveness
Porous concrete matrix	Structural-environmental system	Acoustic moderation	Thermal buffering	Adaptive infrastructure
Eco-modified composite	Integrated adaptive material	Resource efficiency	Multifunctional regulation	Sustainable reconstruction

summarizes the principal environmental and adaptive performance characteristics of the investigated material components.

Compressive strength testing demonstrated that the incorporation of bio-based inclusions influenced the mechanical performance of the concrete composites while remaining within acceptable operational ranges for adaptive and non-critical urban infrastructure applications. Increasing concentrations of plant-based additives generally reduced compressive resistance due to the formation of additional pore structures within the cement matrix. However, reductions in structural density were accompanied by improvements in thermal buffering, moisture stabilization, and passive climatic regulation. These findings reinforce broader sustainability-oriented perspectives suggesting that adaptive materials require a balance between structural optimization and ecological functionality rather than the exclusive prioritization of maximum compressive performance [35].

The experimental analysis further demonstrated that eco-modified composites possess improved thermal performance compared to conventional dense concrete mixtures. The incorporation of porous minerals and plant-based fibers reduced thermal conductivity and increased thermal inertia, allowing the materials to moderate short-term temperature fluctuations more effectively. These thermal buffering properties are particularly relevant in urban environments where buildings and infrastructure increasingly rely on passive climate regulation. In post-war reconstruction settings, such characteristics may also support energy-efficient rebuilding under conditions of infrastructural instability, limited resources, and fluctuating energy supplies.

Another important finding concerns the acoustic properties of eco-modified composites. Increased porosity and irregular capillary structures created by biomass inclusions contributed to sound absorption and vibration reduction within the material matrix. Although the study did not specifically examine advanced acoustic optimization, the findings suggest that these composites may improve acoustic comfort in dense urban environments, public spaces, and underground infrastructure. Such characteristics are particularly important where environmental quality, user comfort, and psychological well-being contribute to broader urban resilience objectives.

The findings additionally demonstrate that adaptive materials may support broader resource-governance objectives within sustainable reconstruction frameworks. The incorporation of secondary natural materials and plant biomass contributes to reduced material intensity, increased utilization of renewable or regionally available resources, and improved environmental adaptability within construction systems. Existing sustainability research increasingly emphasizes the importance of circular material systems, low-impact construction strategies, and resource-efficient infrastructural development within long-term urban sustainability transitions [20,37]. In this regard, eco-modified materials may contribute simultaneously to environmental adaptation, resource efficiency, and infrastructural resilience within post-war urban systems.

Within the broader conceptual framework of the study, the results indicate that eco-modified construction materials should not be evaluated exclusively according to conventional engineering criteria focused solely on structural optimization and compressive strength. Instead, the findings support a more integrated understanding of construction materials as multifunctional environmental systems capable of participating actively in urban ecological regulation, passive climatic adaptation, moisture management, and human-centered infrastructure design. Such an approach aligns with socio-ecological resilience perspectives emphasizing the interdependence between material systems, environmental governance, resource efficiency, and adaptive urban resilience [2].

The findings further suggest that environmentally adaptive materials can support more sustainable forms of urban development by improving the long-term performance and flexibility of infrastructure. As cities face increasing climate variability, infrastructural stress, and resource uncertainty, future construction systems may benefit from materials that contribute to passive climate regulation rather than serving solely as structural components. In this way, eco-modified materials may help support more flexible and environmentally integrated infrastructure systems.

Overall, the experimental assessment demonstrates that eco-modified concrete composites have considerable potential for application in sustainable post-war reconstruction. The investigated materials contribute to moisture regulation, thermal buffering, acoustic comfort, and resource efficiency, supporting more adaptable forms of infrastructure development. These findings reinforce the broader argument that resilient post-war cities require infrastructure systems in which materials contribute not only structural functions, but also environmental performance.

However, the investigated composites were evaluated primarily for their environmental performance rather than for use as load-bearing underground structural systems. Consequently, the present study does not assess long-term subterranean durability, root–material interactions, or lifecycle performance. The materials should therefore be viewed as potential components of environmental infrastructure, including non-structural architectural elements, green-infrastructure systems, environmental buffering layers, and modular landscape applications. The plant-based inclusions examined consisted of wood particles and processed hogweed biomass incorporated to modify the internal capillary and porous structure of the composite matrix.

4. Discussion

4.1. Adaptive Biophilic Infrastructure as Urban Governance Strategy

The findings of this study suggest that adaptive biophilic infrastructure should be interpreted not merely as an architectural or environmental intervention, but as an emerging urban governance strategy integrating ecological regulation, infrastructural resilience, resource efficiency, and human-centered spatial organization within contemporary cities. Rather than functioning as isolated technological solutions, vertical greening systems, adaptive public infrastructure, underground urban environments, and environmentally responsive materials operate most effectively as interconnected components of broader socio-ecological urban systems. This interpretation aligns with resilience and sustainability transition research emphasizing the importance of integrated governance frameworks [83,84] under conditions of environmental instability, infrastructural vulnerability, urban densification, and geopolitical uncertainty [2,3,20].

The discussion demonstrates that ecological infrastructure increasingly performs functions traditionally associated with centralized technological systems. Vertical greening systems, adaptive facades, ecological corridors, and daylight-integrated public environments contribute not only to environmental moderation, but also to environmental perception, social interaction, and psycho-emotional well-being. These observations support previous research suggesting that ecological systems may simultaneously improve environmental performance and strengthen psychological and social dimensions of urban life [8,9,24]. In this regard, adaptive biophilic infrastructure extends beyond aesthetic enhancement [24,48,63] and becomes part of a broader governance framework in which ecological processes actively participate in urban regulation and resilience.

The analyzed urban examples additionally reinforce the importance of multifunctionality and systemic integration within resilient urban development. Projects such as Montreal’s RÉSO, the High Line, Seoullo 7017, and Singapore’s integrated biophilic infrastructures illustrate how layered or specialized infrastructures may evolve into multifunctional systems supporting mobility, ecological continuity, public accessibility, and environmental adaptability simultaneously [30,31,32]. These findings correspond with sustainability transition perspectives emphasizing interconnected socio-technical and socio-ecological transformation [7] rather than fragmented technological modernization [19].

Within the context of post-war Ukrainian reconstruction, these governance implications become particularly significant. Conventional reconstruction approaches frequently prioritize rapid technical rebuilding aimed at restoring pre-existing urban systems. However, the findings suggest that reconstruction should instead be understood as an opportunity for long-term socio-ecological transformation integrating resilience, environmental adaptation, and human-centered urban development. In this regard, adaptive infrastructure contributes not only to environmental sustainability and infrastructural recovery, but also to social stability, psychological resilience, and urban continuity under prolonged geopolitical uncertainty. Because these pressures emerge differently across Ukrainian cities, reconstruction strategies must remain flexible, context-sensitive, and scalable rather than relying on standardized or purely technological solutions.

A particularly important implication concerns the relationship between adaptive infrastructure and psycho-emotional resilience [4]. The integration of vegetation, natural lighting, open spatial organization, and environmentally moderated public environments contributes to reducing sensory stress and strengthening perceptions of comfort and environmental continuity. These observations reinforce interdisciplinary research demonstrating the importance of biophilic environments for cognitive restoration, emotional regulation, and psychological well-being within highly stressed urban populations [24,28]. In post-war environments characterized by prolonged uncertainty and infrastructural instability, such human-centered environmental strategies become increasingly important components of urban governance and resilience planning.

The study further suggests that urban governance should move beyond rigid single-purpose planning approaches toward more flexible and integrated infrastructure models. Multi-level pedestrian corridors, underground systems, ecological infrastructure, and multifunctional public spaces demonstrate how urban environments can simultaneously support environmental, protective, logistical, social, and psychological needs. This multifunctionality increases urban flexibility and improves the efficient use of limited land resources, particularly in post-war cities facing economic constraints and spatial disruption.

The discussion also highlights the importance of decentralized and environmentally integrated infrastructure for long-term sustainable urban development. Vertical greening systems, adaptive building envelopes, ecological corridors, and environmentally responsive materials can improve local environmental conditions while reducing operational energy demands. These observations align with research emphasizing flexible and decentralized infrastructure as an important component of long-term urban development [19,20].

Importantly, the study indicates that adaptive biophilic infrastructure should not be viewed as a universal model that can be transferred independently of local climatic, economic, institutional, and social conditions. Its effectiveness depends on factors such as governance capacity, resource availability, existing infrastructure, and local needs. Consequently, international examples should be adapted to the specific conditions of post-war Ukrainian cities rather than replicated directly. In smaller or economically constrained cities, reconstruction strategies may need to prioritize scalable, low-cost, and multifunctional interventions rather than technologically intensive megaprojects.

Overall, adaptive biophilic infrastructure can be understood as an approach that links environmental quality, urban flexibility, and people-centered development. In post-war settings, its value lies less in individual interventions than in its ability to support integrated and adaptable reconstruction pathways.

4.2. Socio-Ecological Resilience and Post-War Reconstruction

The findings of this study demonstrate that post-war reconstruction requires a broader understanding of resilience that extends beyond the restoration of damaged infrastructure. Traditional reconstruction approaches have often focused on rebuilding buildings, transportation networks, and technical systems in order to restore basic urban functions. However, such approaches alone are insufficient for addressing the environmental, psychological, spatial, and governance challenges that emerge in post-war cities. In the Ukrainian context, reconstruction increasingly involves not only physical rebuilding, but also the development of urban systems that support environmental sustainability, flexibility, social stability, and human well-being under conditions of continuing geopolitical uncertainty. Achieving these objectives will depend not only on technical and environmental performance, but also on public acceptance, community engagement, and participatory planning processes that align reconstruction priorities with local needs and patterns of urban use.

Urban resilience provides a useful framework for interpreting these transformations. Rather than relying solely on robust infrastructure, resilient cities also depend on effective governance, ecological integration, adaptive planning, and social cohesion [2,3,21]. The findings demonstrate that biophilic infrastructure, multifunctional underground systems, and environmentally responsive materials can contribute to resilience through a combination of environmental, infrastructural, and social benefits.

An important implication concerns the relationship between resilience and psycho-emotional recovery within post-war environments. Environmental comfort, natural lighting, vegetation systems, and adaptive public spaces significantly influence perceptions of safety, emotional stability, and social cohesion. These observations correspond with interdisciplinary research emphasizing the role of biophilic and human-centered environments in reducing psychological stress and supporting cognitive restoration within crisis-affected populations [8,24,28]. Consequently, reconstruction should not focus exclusively on technical recovery or defensive infrastructure, but also on restoring environmental quality, social interaction, and human-centered urban experience.

An important challenge in post-war reconstruction is balancing ecological openness with urban security. Biophilic planning typically emphasizes connectivity, accessibility, and public interaction, whereas post-conflict conditions often require protective infrastructure, controlled access, and emergency-response capacity. Rather than viewing these objectives as conflicting, resilient reconstruction should pursue multifunctional spatial solutions that integrate environmental quality with protective functions [85]. Examples include vegetated earth berms and landscape barriers that provide both security buffering and ecological value, controlled-access green corridors that maintain pedestrian connectivity while supporting emergency management requirements, multifunctional public spaces incorporating shelter facilities, and daylight-integrated underground environments connected to surface-level green infrastructure. Such approaches allow urban environments to remain accessible, environmentally attractive, and socially active while enhancing safety and preparedness. Resilience therefore depends not on maximizing either openness or security, but on creating urban environments that balance ecological connectivity with evolving protection needs.

The discussion also highlights the strategic role of multifunctional underground systems in post-war reconstruction. The analyzed examples demonstrate that underground infrastructure can support mobility, emergency protection, logistical continuity, public accessibility, and public services simultaneously. In the Ukrainian context, underground systems increasingly combine shelter functions with long-term urban services and public-space uses. This multifunctionality improves flexibility and supports urban continuity under conditions of climatic, political, and infrastructural uncertainty [31].

Another important finding concerns the relationship between resilience and resource efficiency. Post-war reconstruction often occurs under conditions of infrastructural damage, economic constraints, material shortages, population displacement, and unstable energy systems. As a result, reconstruction strategies should combine environmental adaptation with resource-efficient and decentralized infrastructure. The findings suggest that environmentally responsive materials, passive climate regulation, ecological infrastructure, and multifunctional spatial systems can reduce energy demands while improving environmental performance in reconstructed urban environments [19,20].

The experiences of Ukrainian cities further demonstrate the importance of context-sensitive reconstruction strategies. Kyiv highlights the value of underground continuity systems and metropolitan infrastructure, while Kharkiv faces challenges associated with infrastructural damage and ongoing security pressures. Dnipro emphasizes logistical and service continuity, Odesa faces maritime and environmental vulnerabilities, and Kherson illustrates the need for hydro-ecological recovery following disruption of water-management systems. Regional cities such as Lviv and Uzhhorod demonstrate the importance of decentralized and adaptable reconstruction approaches.

These differing urban conditions require differentiated implementation pathways. In Kyiv, priorities may focus on underground continuity systems, metropolitan resilience, and multifunctional infrastructure networks. Kharkiv may require greater emphasis on protective infrastructure, adaptive public-space recovery, and phased reconstruction under continuing security pressures. Dnipro highlights the importance of logistical and healthcare-support infrastructure, while Odesa requires strategies that integrate maritime resilience, environmental adaptation, and critical-infrastructure protection. In Kherson, reconstruction is closely linked to hydro-ecological recovery and environmental rehabilitation. Meanwhile, Lviv and Uzhhorod may benefit from strategies emphasizing demographic adaptation, decentralized resilience, and scalable urban development. More broadly, heavily damaged or frontline cities such as Kharkiv and Kherson may need to prioritize critical infrastructure recovery, civil protection systems, and environmental rehabilitation, whereas metropolitan and regional service hubs such as Kyiv and Dnipro may focus on transportation continuity, logistics, healthcare infrastructure, and multifunctional public services. Environmentally sensitive cities such as Odesa require greater emphasis on coastal resilience and climate adaptation, while regional growth centers such as Lviv and Uzhhorod may prioritize housing capacity, demographic adaptation, and scalable urban development. These differences reinforce the argument that post-war reconstruction should be guided by context-sensitive frameworks rather than a single national model. The priorities identified here should be understood as illustrative planning directions rather than prescriptive reconstruction roadmaps.

Importantly, resilience strategies must remain context-sensitive, scalable, and economically feasible. Large-scale international examples such as Montreal, New York, Seoul, and Singapore cannot be transferred directly to Ukrainian cities without adaptation to local climatic, institutional, economic, and spatial conditions. Although these projects often involve substantial financial and technological investments, their main value lies in the transferable principles they demonstrate, including multifunctionality, adaptive reuse, ecological integration, and infrastructural flexibility. Consequently, relatively low-cost interventions such as vertical greening systems, adaptive reuse of existing infrastructure, environmentally responsive materials, and multifunctional public-space design may offer more immediately applicable solutions. By contrast, large-scale underground networks and technologically intensive environmental systems may require phased implementation and long-term institutional support. Adaptive reconstruction strategies should therefore prioritize multifunctionality, environmental quality, infrastructural flexibility, and people-centered design rather than relying primarily on large technological megaprojects.

4.3. Environmentally Responsive Materials and Sustainability Transitions

The findings of the experimental assessment demonstrate that environmentally responsive materials may play an increasingly important role within sustainability transitions and adaptive urban governance frameworks [38,39]. Traditionally, construction materials have been evaluated primarily according to structural performance, durability, and economic efficiency. However, the findings suggest that contemporary urban sustainability increasingly requires material systems capable of performing environmental regulatory functions alongside conventional structural roles. In this regard, eco-modified concrete composites incorporating natural minerals and plant-based inclusions contribute not only to construction processes, but also to broader socio-ecological adaptation strategies associated with resilient urban development [35,36].

The experimental analysis indicates that porous mineral additives and biomass inclusions significantly influence the environmental behavior of concrete composites. The incorporation of zeolite and plant-based particles enhanced moisture stabilization, thermal buffering, and environmental responsiveness through interconnected capillary and microporous structures [73,74,75]. These findings support previous research suggesting that porous mineral systems and bio-based materials may improve passive environmental regulation while reducing dependence on energy-intensive climatic control systems [37,72]. Such characteristics become particularly relevant within post-war reconstruction contexts where infrastructural instability and energy insecurity increase the importance of passive and resource-efficient environmental regulation strategies.

The findings further demonstrate that adaptive materials contribute to urban resilience through multifunctionality rather than maximum structural optimization alone. Although biomass inclusions reduced compressive resistance in comparison with dense conventional concrete systems, the materials exhibited improved thermal inertia, moisture regulation, acoustic buffering, and environmental responsiveness. These observations reinforce sustainability perspectives suggesting that future construction systems should be evaluated according to integrated environmental performance criteria rather than exclusively through narrowly defined engineering metrics [35,36]. Within adaptive urban systems, environmental responsiveness and resource efficiency may therefore become equally important indicators of infrastructural resilience.

The discussion additionally highlights the relationship between material systems and passive environmental governance. Improvements in moisture exchange and thermal stabilization suggest that eco-modified composites may contribute to reducing operational energy demands by supporting localized environmental regulation within urban structures. These findings correspond with sustainability transition theories emphasizing the shift from centralized and energy-intensive infrastructures toward decentralized and environmentally integrated systems [19,20]. Consequently, adaptive materials may function as components of broader urban sustainability strategies rather than as isolated technical innovations.

An important implication concerns the use of secondary natural materials and locally available biomass resources in reconstruction. Plant-based inclusions can help reduce material consumption while supporting more circular and resource-efficient construction practices. Existing sustainability research highlights the importance of low-impact materials, circular construction systems, and efficient resource management in sustainable urban development [37]. In post-war settings characterized by damaged supply chains, economic instability, and material shortages, locally available ecological materials may provide valuable opportunities for sustainable reconstruction and greater resource independence.

The findings also suggest that adaptive materials can improve indoor environmental quality and user comfort within urban infrastructure. Moisture regulation, thermal buffering, and acoustic performance influence not only environmental conditions, but also comfort within enclosed spaces. This is particularly important in public infrastructure, underground environments, and adaptive shelter facilities where people may spend extended periods under stressful conditions. The results therefore reinforce the broader argument that resilient reconstruction should integrate environmental, infrastructural, and human considerations within planning and decision-making processes.

At the same time, the study indicates that environmentally adaptive materials should not be viewed as universally applicable solutions independent of local climatic, economic, technological, and infrastructural conditions. Their effectiveness depends on resource availability, climate, production capacity, construction standards, and long-term maintenance requirements. Consequently, the successful use of eco-modified composites in post-war reconstruction requires planning approaches that balance environmental innovation with economic feasibility and practical implementation.

Another important implication concerns the relationship between material systems and sustainable urban development. The findings suggest that future resilient cities will increasingly depend on governance systems capable of coordinating environmental management, adaptive planning, institutional cooperation, and resource allocation. In post-war reconstruction, these capacities are essential for translating innovative infrastructure concepts into practical urban strategies. This reflects a broader shift toward understanding urban infrastructure as an interconnected system that combines environmental management, resource use, infrastructure performance, and human needs.

The findings further support resilience research emphasizing adaptability, flexibility, and integration as key characteristics of sustainable urban systems [2,21]. Adaptive materials can strengthen infrastructure performance by supporting passive climate regulation and resource-efficient operation under changing environmental conditions. Such materials may therefore contribute to long-term urban resilience in post-war environments exposed to environmental stress and geopolitical uncertainty. Overall, eco-modified materials demonstrate potential to support reconstruction through improved environmental performance, resource efficiency, and passive climate regulation. Their greatest contribution may lie in improving the long-term adaptability of urban infrastructure under changing conditions.

4.4. Governance and Implementation Pathways for Post-War Reconstruction

Post-war reconstruction requires planning and governance approaches that coordinate ecological infrastructure, urban resilience, resource management, and long-term socio-economic recovery within a coherent framework. The findings suggest that adaptive biophilic infrastructure is most effective when supported by planning systems that integrate regulatory tools, institutional coordination, and resource allocation rather than relying solely on technological or architectural solutions. In this regard, urban resilience depends not only on physical infrastructure, but also on the ability of institutions to guide reconstruction under conditions of environmental, economic, and geopolitical uncertainty.

A first priority is the integration of resilience-focused planning tools into reconstruction strategies. Adaptive zoning regulations, resilience-sensitive building standards, green infrastructure requirements, and multifunctional land-use planning can support the systematic incorporation of ecological and adaptive infrastructure into redevelopment projects. Such measures can help ensure that ecological corridors, biophilic public spaces, underground systems, and environmentally responsive materials are treated as core components of reconstruction rather than optional additions.

A second priority involves coordination across different levels of government and stakeholder groups. Post-war reconstruction in Ukraine requires cooperation among municipal authorities, regional administrations, national ministries, infrastructure agencies, academic institutions, private-sector actors, and international development partners. Effective implementation therefore depends on arrangements capable of coordinating technical expertise, financial resources, regulatory frameworks, and long-term planning objectives. Cross-sector collaboration becomes particularly important when projects combine environmental, infrastructural, social, and security-related goals.

The findings also highlight the importance of mechanisms that support the efficient allocation of financial and material resources. Reconstruction programmes frequently operate under conditions of budget constraints, damaged supply chains, and competing priorities. As a result, investments should be prioritized according to their multifunctionality, long-term benefits, and environmental performance. Projects that simultaneously improve environmental quality, public accessibility, emergency preparedness, and social well-being may provide greater long-term value than narrowly focused interventions. Public–private partnerships, international reconstruction funds, climate-adaptation programmes, and targeted municipal investment schemes may further support implementation.

From a policy perspective, implementation may be supported through several practical instruments, including resilience-oriented building codes, adaptive zoning regulations, mandatory green-infrastructure requirements for major redevelopment projects, incentives for the adaptive reuse of existing infrastructure, and targeted funding programmes for multifunctional public spaces and underground resilience systems. Participatory planning mechanisms involving local communities, municipal authorities, and reconstruction agencies may further help align reconstruction priorities with local needs while improving public acceptance and long-term project viability.

Importantly, reconstruction strategies must remain context-sensitive. The needs of Kyiv, Kharkiv, Dnipro, Odesa, Kherson, Lviv, Uzhhorod, and other Ukrainian cities differ considerably according to their infrastructure conditions, demographic pressures, environmental challenges, and security requirements. Consequently, reconstruction planning should emphasize flexible implementation pathways rather than standardized national models. International examples such as Montreal, New York, Seoul, and Singapore provide valuable reference points; however, their relevance depends on adaptation to local institutional, economic, climatic, and social conditions. Overall, the findings suggest that adaptive biophilic infrastructure should be understood not only as a design or environmental strategy, but also as a planning approach that connects environmental quality, infrastructure resilience, resource efficiency, and people-centered urban development within long-term post-war reconstruction.

5. Conclusions

This article examined the role of adaptive biophilic infrastructure and resource governance in sustainable post-war urban reconstruction in Ukraine. The study developed an interdisciplinary framework that combines adaptive urbanism, urban resilience, biophilic infrastructure, underground urban systems, and environmentally responsive materials to explore how cities can respond more effectively to environmental, infrastructural, and geopolitical uncertainty. Through comparative urban analysis, theoretical synthesis, and experimental assessment of eco-modified construction materials, the study demonstrates that resilient reconstruction depends on integrating ecological, infrastructural, material, and human-centered approaches.

The findings show that biophilic infrastructure provides benefits that extend beyond conventional greening or environmental enhancement. Vertical greening systems, adaptive facades, ecological corridors, daylight-integrated environments, and multifunctional public spaces can improve environmental quality, thermal performance, user comfort, and urban resilience. At the same time, underground and multi-level infrastructure can support mobility, public accessibility, emergency protection, and continuity of essential services. The experimental assessment further demonstrated that eco-modified concrete composites can contribute to moisture regulation, thermal buffering, acoustic comfort, and resource-efficient infrastructure. Together, these findings suggest that future urban systems may increasingly rely on infrastructure and materials that provide both structural and environmental functions. A central conclusion of this study is that post-war reconstruction cannot be reduced to rebuilding damaged infrastructure alone. Reconstruction should instead be understood as a long-term process that integrates environmental sustainability, adaptive planning, resource-efficient materials, and human well-being. The findings indicate that fragmented approaches focused solely on engineering recovery or technological modernization are unlikely to address the complex environmental, social, and governance challenges facing post-war cities. In contrast, adaptive biophilic infrastructure offers a framework for linking environmental quality, infrastructure resilience, and sustainable urban development within reconstruction planning.

The international examples examined in this study demonstrate how ecological integration, adaptive reuse, and multifunctional infrastructure can strengthen urban resilience. At the same time, the analysis highlights the importance of context-sensitive implementation within Ukraine, where reconstruction priorities differ across metropolitan, frontline, coastal, and regional urban systems. Consequently, reconstruction strategies should emphasize flexibility, multifunctionality, and adaptation to local conditions rather than direct replication of international models.

Several limitations should be acknowledged. First, the psycho-emotional and well-being implications discussed in this study are derived primarily from the biophilic design and urban resilience literature rather than from primary survey or interview data collected within Ukrainian communities. Consequently, the study does not incorporate direct stakeholder perspectives or extensive regional statistical datasets, reflecting its conceptual and exploratory design. Second, the comparative urban analysis was interpretive rather than quantitative and was intended to identify transferable planning principles rather than establish performance rankings or direct comparability among cities. Third, the material assessment focused on environmental performance and adaptive potential rather than advanced structural optimization or large-scale infrastructure applications. Finally, the study did not undertake quantitative economic benchmarking, lifecycle cost assessment, feasibility analysis, or comparative resilience-performance evaluation of the selected urban cases. These limitations suggest that the findings should be interpreted as exploratory and conceptual, providing a foundation for future empirical, economic, and performance-based research on adaptive reconstruction strategies.

Future research should expand the empirical basis of adaptive urban systems through long-term environmental monitoring, simulation modelling, performance-based assessment of adaptive infrastructure, and evaluation of the economic feasibility, implementation costs, and long-term benefits of reconstruction interventions. Additional studies should examine psycho-emotional outcomes through surveys, interviews, participatory assessments, and longitudinal research involving residents, displaced populations, and local stakeholders. Further work is also needed on the governance dimensions of reconstruction, including participatory planning, resource management, and policy frameworks that support resilient urban development. Overall, the study argues that future resilient cities should be understood not as static technical structures, but as adaptive urban systems that integrate ecological infrastructure, flexible planning, resource-efficient materials, and human-centered design. Within the context of post-war reconstruction in Ukraine, adaptive biophilic infrastructure provides a useful framework for moving beyond conventional rebuilding toward more resilient, sustainable, and environmentally responsive urban futures.