Challenges

31 pages, 2049 KB

Open AccessArticle

Blue Planetary Health and Multispecies Responsibility: A Relational Framework for Ocean Governance

by João Miguel Alves Ferreira

Challenges 2026, 17(2), 20; https://doi.org/10.3390/challe17020020 - 18 Jun 2026

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Contemporary Blue Planetary Health frameworks frequently approach marine degradation primarily as a technical management problem while insufficiently addressing the relational, ethical, and political–economic conditions driving ocean collapse. The framework proposes that dominant marine governance paradigms continue to reproduce anthropocentric and extractivist assumptions that [...] Read more.

Contemporary Blue Planetary Health frameworks frequently approach marine degradation primarily as a technical management problem while insufficiently addressing the relational, ethical, and political–economic conditions driving ocean collapse. The framework proposes that dominant marine governance paradigms continue to reproduce anthropocentric and extractivist assumptions that reduce oceans to economic assets rather than recognizing them as living multispecies relational systems. In response, the study develops the Blue Stratified Relational Responsibility Framework (BSRRF), an interdisciplinary model integrating multispecies ethics, marine psychophysiology, environmental humanities, political ecology, Indigenous relational ontologies, and ocean governance. The framework advances three central claims: marine sustainability requires relational rather than purely instrumental governance; humans possess asymmetrical ecological responsibility due to their technological and institutional power; and meaningful Blue Planetary Health transformation requires simultaneous shifts in moral imagination, affective perception, governance systems, and political economy. The study further critiques dominant Blue Economy paradigms for reproducing extractivist and colonial dynamics under narratives of sustainability and innovation. Ultimately, the framework argues that although the ocean crisis manifests ecologically, its underlying drivers are simultaneously epistemological, political, economic, and civilizational. Consequently, advancing Blue Planetary Health requires integrated transformations in education, governance, public policy, and multispecies ethical responsibility. Full article

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19 pages, 378 KB

Open AccessArticle

Quantifying the Economic Burden of Air Pollution Through Premature Mortality: A Harm-Reduction Perspective for Advancing Planetary Health

by Ehsan Jozaghi

Challenges 2026, 17(2), 19; https://doi.org/10.3390/challe17020019 - 10 Jun 2026

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Abstract

Environmental change, accelerated by increasing global temperatures, has become a defining economic, ecological, and public health issue of the twenty-first century. This study presents an economic evaluation of early mortality associated with air pollution, a major factor underlying worldwide patterns of illness and [...] Read more.

Environmental change, accelerated by increasing global temperatures, has become a defining economic, ecological, and public health issue of the twenty-first century. This study presents an economic evaluation of early mortality associated with air pollution, a major factor underlying worldwide patterns of illness and premature mortality, through which climate change affects global population health. Using secondary global mortality estimates and an economic valuation framework, both tangible costs (e.g., economic output and income losses) and quality-of-life loss (e.g., welfare loss associated with premature mortality) are estimated. The paper contributes to planetary health scholarship by integrating established economic valuation approaches with harm-reduction and systems-based perspectives to reinterpret air pollution as an interconnected environmental, economic, and societal challenge rather than solely a public health issue. Air pollution is associated with reduced life expectancy and approximately 3 million premature deaths annually worldwide. The estimated annual tangible economic burden is approximately US$940.9 billion (range: US$550.5 billion–US$1.65 trillion), while intangible costs are estimated at US$37.8 trillion annually (range: US$13.3 trillion–US$48.8 trillion). The findings suggest that air pollution should be understood not merely as a health-related challenge but also as a broader planetary health challenge with implications for environmental sustainability, economic resilience, and long-term societal well-being. Targeted air quality interventions and pollution reduction strategies may therefore generate substantial public health and societal co-benefits worldwide. Full article

(This article belongs to the Section Climate Change, Air, Water, and Planetary Systems)

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13 pages, 509 KB

Open AccessViewpoint

Tikanga Māori as a Relational Framework for Cultural Change in Aotearoa New Zealand

by Ben Gray and Hoani Smith

Challenges 2026, 17(2), 18; https://doi.org/10.3390/challe17020018 - 31 May 2026

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Abstract

Tikanga Māori, the indigenous system of values, principles, and practices in Aotearoa New Zealand, offers a relational, ethics-based framework for responding to contemporary global challenges such as geopolitical instability, environmental degradation, and digital disruption. Dominant Western approaches, often grounded in individualism and resource [...] Read more.

Tikanga Māori, the indigenous system of values, principles, and practices in Aotearoa New Zealand, offers a relational, ethics-based framework for responding to contemporary global challenges such as geopolitical instability, environmental degradation, and digital disruption. Dominant Western approaches, often grounded in individualism and resource extraction, are increasingly limited in addressing these issues. Drawing on Aotearoa New Zealand as a case study, tikanga is presented as a living system centred on interconnectedness, responsibility, and collective wellbeing. Examples from law, health, research ethics, and sport demonstrate how these values shape both institutional practice and everyday behaviour. Rather than functioning as a cultural add-on, tikanga provides an alternative way of understanding relationships between people, communities, and the environment. The analysis highlights the relevance of tikanga-informed approaches for rethinking governance, leadership, and sustainability in an increasingly complex and interconnected world. Full article

(This article belongs to the Section Ethics, Values, Culture and Spirituality)

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24 pages, 1473 KB

Open AccessReview

Microbial Inoculants for Climate-Resilient Food Systems: Ecological Limits, Context Dependency, and Evidence Gaps

by Meriam Bouri, Tarek Agha and Fikrettin Şahin

Challenges 2026, 17(2), 17; https://doi.org/10.3390/challe17020017 - 27 May 2026

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Abstract

Climate change, soil degradation, and the disruption of global nutrient cycles are placing unprecedented pressure on agricultural systems and global food security. These challenges are increasingly recognized as central concerns for planetary health, as agriculture simultaneously depends upon and alters critical Earth system [...] Read more.

Climate change, soil degradation, and the disruption of global nutrient cycles are placing unprecedented pressure on agricultural systems and global food security. These challenges are increasingly recognized as central concerns for planetary health, as agriculture simultaneously depends upon and alters critical Earth system processes. Microbe-based agricultural inputs (including biofertilizers, biostimulants, and biocontrol agents) have been widely promoted as climate-smart solutions capable of enhancing productivity, resilience, and environmental sustainability. However, despite rapid scientific and commercial advances, their performance in the field remains highly variable and strongly context-dependent. This review critically examines the evidence base underpinning climate-smart microbial solutions, with a particular focus on their capacity to confer climate resilience across diverse crops, soils, and climatic conditions. We synthesize current knowledge on the functional roles of beneficial microorganisms, including extremophilic and stress-adapted taxa, while highlighting key biological, technological, ecological, and socio-economic constraints that limit predictability and scalability. Special attention is given to evidence gaps related to long-term field performance, ecosystem-level impacts, and the trade-offs associated with widespread microbial deployment. We further assess recent innovations such as synthetic microbial consortia, microbiome engineering, advanced formulations, and data-driven decision tools. Then we highlight how these new technologies may address context dependency but still need validation under real-world conditions. Finally, we discuss policy, regulatory, and capacity-building considerations required to responsibly integrate microbial solutions into climate-smart agriculture frameworks. Overall, this review argues that microbial inoculants should be viewed not as universal inputs but as context-specific tools whose successful deployment depends on robust evidence, ecological sensitivity, and system-level integration. Advancing microbial solutions for agriculture will therefore require aligning technological innovation with broader planetary health objectives, ensuring that efforts to enhance agricultural productivity also support long-term ecosystem stability and resilience. Full article

(This article belongs to the Section Biodiversity, Ecosystems, and Microbiomes)

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18 pages, 1166 KB

Open AccessArticle

Multispecies Responsibility and Planetary Health Education: Integrating Indigenous Relational Ontologies and Behavioral Transformation

by João Miguel Alves Ferreira and Sergii Tukaiev

Challenges 2026, 17(2), 16; https://doi.org/10.3390/challe17020016 - 20 May 2026

Cited by 3 | Viewed by 554

Abstract

This article advances a transdisciplinary framework for planetary health education grounded in multispecies responsibility and Indigenous relational ontologies. Addressing the limitations of anthropocentric environmental paradigms, the paper proposes an expanded Stratified Relational Responsibility Model integrating ethical, ecological, and neurobiological dimensions of human–more-than-human relations. [...] Read more.

This article advances a transdisciplinary framework for planetary health education grounded in multispecies responsibility and Indigenous relational ontologies. Addressing the limitations of anthropocentric environmental paradigms, the paper proposes an expanded Stratified Relational Responsibility Model integrating ethical, ecological, and neurobiological dimensions of human–more-than-human relations. The framework bridges insights from environmental ethics, anthropology, and affective neuroscience to examine how relational awareness, emotional regulation, and embodied cognition shape pro-environmental behavior. Four pedagogical pillars are introduced to support behavioral transformation, emphasizing relational perception, affective attunement, ethical reflexivity, and collective responsibility. The article further discusses implementation challenges within Western educational contexts and highlights the need for culturally responsive adaptation. By situating human agency within multispecies networks, the model contributes to ongoing debates in planetary health and sustainability education, offering a theoretically robust and practically oriented approach to fostering ecological responsibility. Full article

(This article belongs to the Special Issue Nurturing Connected Consciousness in the Anthropocene: Addressing Calls for Cultural and Spiritual Transformation as a Path to Personal, Collective, and Planetary Health)

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29 pages, 21587 KB

Open AccessFeature PaperArticle

Modeling the Impacts of Climate Change on Malaria Distribution in Ethiopia: The Case of Arba Minch Town and Surrounding Areas

by Kalkidan Dessalegn, Tesfay Mekonnen, Ababe Kebede, Ssemwanga Mohammed, Melkamu Diriba and Elias Fisha

Challenges 2026, 17(2), 15; https://doi.org/10.3390/challe17020015 - 7 May 2026

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Abstract

This study presents the relationship between climate variables and malaria outbreaks and forecasts the future malaria incidence in Arba Minch Town and its surrounding areas. High-resolution gridded climate data (~4 km × 4 km) covering the period 1981 to 2020 was obtained from [...] Read more.

This study presents the relationship between climate variables and malaria outbreaks and forecasts the future malaria incidence in Arba Minch Town and its surrounding areas. High-resolution gridded climate data (~4 km × 4 km) covering the period 1981 to 2020 was obtained from the Ethiopian Meteorological Institute. Additionally, Coupled Model Intercomparison Project Phase 6 (CMIP6) model simulations under two shared socioeconomic pathways (SSP2-4.5 and SSP5-8.5) were used to analyze future climate patterns. Malaria case data were obtained from local health centers located in Arba Minch town and surrounding woredas. Malaria projections were simulated using the Seasonal Autoregressive Integrated Moving Average (SARIMAX) model. Climate projections indicate a significant rise in mean temperature by the end of 21st century, increasing by 2.9 °C under SSP2-4.5 and 3.48 °C under SSP5-8.5. Average monthly rainfall during the baseline period (70.53 mm) is expected to increase to 94.18 mm and 86.09 mm under the SSP2-4.5 and SSP5-8.5 scenarios, respectively. Malaria case distribution during the baseline period (2005–2017) ranged from 79 to 552 cases per month, while future projections suggest that cases will increase by approximately 600 in the near-term and up to more than 1000 cases by the end of the century. The SARIMAX model effectively captured seasonal variations and short-term fluctuations demonstrating a strong forecasting performance. The model generally indicated that wetter conditions and moderate temperatures will favor mosquito breeding and intensify malaria transmission. Full article

(This article belongs to the Special Issue Climate Change and Migration: Navigating Intersecting Crises)

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14 pages, 226 KB

Open AccessArticle

Beyond «Climate Refugees»: Rethinking International Protection for Environmentally Displaced Persons

by Sara Caselles Rodríguez

Challenges 2026, 17(2), 14; https://doi.org/10.3390/challe17020014 - 30 Apr 2026

Viewed by 520

Abstract

Climate change and environmental degradation are increasingly recognized as major drivers of human mobility, operating through both sudden-onset disasters and slow-onset processes such as sea-level rise, desertification and resource scarcity. Although estimates vary widely, projections suggest that millions of people may become displaced [...] Read more.

Climate change and environmental degradation are increasingly recognized as major drivers of human mobility, operating through both sudden-onset disasters and slow-onset processes such as sea-level rise, desertification and resource scarcity. Although estimates vary widely, projections suggest that millions of people may become displaced by 2050 because of climate change, predominantly within their own countries but also across international borders. This article examines the emerging phenomenon of “environmental migration” against the backdrop of international refugee law and broader human rights frameworks. It first maps the diverse environmental scenarios that trigger displacement before analyzing the existing international legal landscape. Particular attention is paid to the contested terminology surrounding “climate refugees”, “environmental migrants” and “environmentally displaced persons” and to the protection gaps that arise from current categorizations. This article argues that, while existing norms on human rights, disaster risk reduction and internal displacement offer partial safeguards, they do not provide coherent legal status or systematic protection for people displaced across borders by climate-related harms. It concludes that climate-related displacement should be addressed through a combination of evolving human rights-based climate litigation, enhanced use of existing instruments and the progressive elaboration of specific normative frameworks. Full article

(This article belongs to the Special Issue Climate Change and Migration: Navigating Intersecting Crises)

10 pages, 621 KB

Open AccessViewpoint

Climate-Resilient Infrastructure as a Public Good: Welfare, Risk, and Climate-Smart Growth

by Manish Vaidya and Soumya Bhowmick

Challenges 2026, 17(2), 13; https://doi.org/10.3390/challe17020013 - 27 Apr 2026

Viewed by 723

Abstract

Climate change has emerged as a defining global crisis, with the frequency and intensity of climate-induced disasters rising sharply and imposing disproportionate costs on developing economies and small island states. This article examines the role of climate-resilient infrastructure as a central pillar of [...] Read more.

Climate change has emerged as a defining global crisis, with the frequency and intensity of climate-induced disasters rising sharply and imposing disproportionate costs on developing economies and small island states. This article examines the role of climate-resilient infrastructure as a central pillar of climate-smart growth, integrating mitigation, adaptation, and long-term development objectives. It situates climate-resilient infrastructure within a planetary health setting, emphasizing the interdependence between human well-being, ecological systems, and infrastructure resilience. Climate-resilient infrastructure, not merely seen as an engineering solution but as a public good that generates significant positive externalities, reduces systemic macroeconomic risk and delivers welfare gains that exceed private financial returns. It discusses the cross-country heterogeneities in resilience outcomes, driven by differences in geographic exposure, economic capacity, institutional quality, and political economy constraints. Building on this, the study advances a welfare-based approach to infrastructure prioritization that incorporates service disruptions, distributional impacts, and fiscal risk, rather than asset values alone. It further outlines policy and financing strategies to bridge the gap between social and private returns, including public investment, concessional finance, blended instruments, and nature-based solutions. By embedding infrastructure within a planetary health lens, the paper argues that resilient systems are critical not only for safeguarding lives and livelihoods, but also for sustaining ecological stability, reducing health risks, and enabling inclusive, sustainable, and climate-smart economic growth. Full article

(This article belongs to the Section Climate Change, Air, Water, and Planetary Systems)

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26 pages, 691 KB

Open AccessReview

Bearing Witness to the Anthropocene: A Contemplative Interbeing Framework for Planetary Health and Nursing Ethics

by Roberta Daiho Rōfū Lavin and Bhawana Kafle

Challenges 2026, 17(2), 12; https://doi.org/10.3390/challe17020012 - 7 Apr 2026

Viewed by 1228

Abstract

While spirituality and contemplative practices are increasingly invoked in response to environmental crisis, the specific mechanisms by which they may mediate professional ethical action remain underdeveloped. This is particularly evident regarding nuclear harm, an existential planetary threat often siloed from health scholarship. This [...] Read more.

While spirituality and contemplative practices are increasingly invoked in response to environmental crisis, the specific mechanisms by which they may mediate professional ethical action remain underdeveloped. This is particularly evident regarding nuclear harm, an existential planetary threat often siloed from health scholarship. This paper investigates the mediating mechanism of contemplative formation as the analytical link between spiritual ethics and planetary health. By centering this link, we demonstrate how professional nursing identity can be restructured to address existential threats like nuclear harm, which are currently under-integrated in health scholarship. We employed a convergent, integrative design combining a scoping review of the literature published in 2015–2025 with a contemplative autoethnography. The scoping review (n = 39) maps the scholarly evidence of spiritual–ecological constructs, while the autoethnography provides a situated, analytical account of the first author’s professional and spiritual formation. Integration was achieved through a four-step thematic synthesis that explicitly identifies where first-person lived experience and third-person scholarly evidence converge to illuminate the process of ethical integration. Four convergent themes describe the pathways linking contemplative practice to planetary health: (1) embodied practice (somatic resilience); (2) narrative meaning-making (transforming grief into purpose); (3) interconnected ethics (reframing remote harms as proximate responsibilities); and (4) reflective integration (the reflexive weaving of clinical and spiritual identities). The findings reveal that while contemplative traditions offer robust resources for systems thinking and equity, nuclear harm and nursing perspectives remain significantly under-integrated in the current planetary health literature. Contemplative formation functions as the mediating mechanism that turns planetary threats into sustained professional advocacy. The Interbeing Planetary Health Framework provides a pragmatic guide for nursing ethics under existential risks. Full article

(This article belongs to the Special Issue Nurturing Connected Consciousness in the Anthropocene: Addressing Calls for Cultural and Spiritual Transformation as a Path to Personal, Collective, and Planetary Health)

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Challenges, Volume 17, Issue 2 (June 2026) – 9 articles

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