Challenges

17 pages, 485 KB

Open AccessArticle

The United Nations Sustainable Development Goals 2030 Vision: Backsliding, Illiberalism, and the Unlikelihood of the Agenda’s Success

by Nadini Persaud and Ruby Dagher

Challenges 2025, 16(4), 51; https://doi.org/10.3390/challe16040051 (registering DOI) - 28 Oct 2025

Abstract

The United Nations 2030 Sustainable Development Goals (SDGs) Agenda has been derailed by various events (e.g., COVID-19, economic crises, democratic backsliding, economic illiberalism, decreasing regard for human rights, and war). These events have diverted attention from the Agenda, and consumed precious limited financial [...] Read more.

The United Nations 2030 Sustainable Development Goals (SDGs) Agenda has been derailed by various events (e.g., COVID-19, economic crises, democratic backsliding, economic illiberalism, decreasing regard for human rights, and war). These events have diverted attention from the Agenda, and consumed precious limited financial resources that could be used to advance the SDGs. With only five years remaining, this initiative is at serious risk of not achieving its desired objectives and impact. Internal contradictions between the goals, challenges to the funding mechanism, and power imbalances within a country, regionally, and globally need to be addressed. This paper will examine the myriad challenges that countries face in trying to implement the Agenda post COVID-19, including those linked to the actions of developed countries, and explore how important changes to the Agenda could be undertaken all while helping to protect a country’s own policy space. Full article

30 pages, 3449 KB

Open AccessReview

Mapping the Trajectory of Planetary Health Education—A Critical and Constructive Perspective from the Global South

by Isaías Lescher Soto, Bernabé Vidal, Lorenzo Verger and Gustavo J. Nagy

Challenges 2025, 16(4), 50; https://doi.org/10.3390/challe16040050 - 21 Oct 2025

Abstract

The planetary health approach has gained traction in academic and international governance spheres; however, its limited integration into education systems has hindered its emergence as a universal framework for addressing the triple planetary crisis (climate change, biodiversity loss, and pollution) and its impacts [...] Read more.

The planetary health approach has gained traction in academic and international governance spheres; however, its limited integration into education systems has hindered its emergence as a universal framework for addressing the triple planetary crisis (climate change, biodiversity loss, and pollution) and its impacts on individual well-being and global health systems. We mapped the evolution of the educational approach to planetary health between 2015 and 2025 from a critical and constructive perspective, using a bibliometric and thematic analysis. Through the bibliometric analysis, we found that publications from the Global North predominate, focusing on health programmes and topics such as climate change, One Health, Global Health and Public Health. The thematic analysis, based on inductive categorisation, allowed us to identify criticisms of the educational approach, such as its curricular marginalisation and limited scalability. From an epistemological perspective, these criticisms refer to technoscientific reductionism, the invisibility of non-Western epistemologies and the decoupling of cognition and environment. Given these limitations, we propose a reconstruction of the planetary health approach along three critical dimensions: Motivation, Legitimacy and Epistemology. This reconstruction is projected into short-, medium- and long-term scenarios at the university level, particularly as part of curriculum reform efforts, to broaden the pedagogical impact and promote a more inclusive and transformative vision. Full article

(This article belongs to the Section Planetary Health Education and Communication)

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25 pages, 309 KB

Open AccessCase Report

Solastalgia Following Environmental Change in Gold Mining Areas of Zimbabwe: A Case Study of Lived Experiences

by Moses Nyakuwanika

Challenges 2025, 16(4), 49; https://doi.org/10.3390/challe16040049 - 20 Oct 2025

Abstract

This case study examines the experience of solastalgia among individuals residing in gold mining towns in Zimbabwe, particularly as environmental degradation intensified, to illustrate the experience of solastalgia through the expressions and reflections of individuals who have been impacted by it. Ecological degradation [...] Read more.

This case study examines the experience of solastalgia among individuals residing in gold mining towns in Zimbabwe, particularly as environmental degradation intensified, to illustrate the experience of solastalgia through the expressions and reflections of individuals who have been impacted by it. Ecological degradation has intensified, and national forest cover has been declining at an average rate of 327,000 hectares per year between 2000 and 2010. Meanwhile, artisanal gold mining releases more than 24 tons of mercury into ecosystems annually, contaminating water bodies. The research employed a qualitative design grounded in the interpretivist paradigm and utilized an inductive methodology. Data were obtained through in-depth interviews with 11 individuals who had resided in areas impacted by mining for an extended period. Thematic analysis was employed to examine individuals’ emotions, thoughts, and behaviours in response to environmental changes, with an emphasis on feelings of loss, sadness, frustration, and disconnection from place. Participants exhibited intense emotional reactions to environmental changes, including profound sadness, anger, feelings of helplessness, and a longing for the past. Of the participants, 70% reported experiencing profound sorrow, while 60% indicated that they employed community support as a coping strategy. The degradation of forests, water sources, and biodiversity contributed to a sense of alienation regarding their environment and identity. Nevertheless, some demonstrated resilience through their faith, community support, and efforts to safeguard the environment. However, their ability to heal and adapt was hindered by persistent systematic neglect and unfulfilled commitments. This case study contributes to the growing literature on solastalgia by presenting specific instances from Zimbabwe, a region where the phenomenon remains inadequately comprehended. This expands the concept of solastalgia to encompass the ecological degradation resulting from mining activities in Africa. Full article

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

14 pages, 3444 KB

Open AccessArticle

Relational Infrastructures for Planetary Health: Network Governance and Inner Development in Brazil’s Traceable Beef Export System

by Ivan Bergier

Challenges 2025, 16(4), 48; https://doi.org/10.3390/challe16040048 - 16 Oct 2025

Abstract

This study analyzes the relational architecture of Brazilian traceable beef exports using a tripartite network model that connects certified meatpacking plants, AgriTrace sustainability protocols, and importing countries. By leveraging export authorization data from the Brazilian Ministry of Agriculture, it is shown that certification [...] Read more.

This study analyzes the relational architecture of Brazilian traceable beef exports using a tripartite network model that connects certified meatpacking plants, AgriTrace sustainability protocols, and importing countries. By leveraging export authorization data from the Brazilian Ministry of Agriculture, it is shown that certification protocols function not merely as compliance tools but as relational governance infrastructures, mediating legitimacy, market access, and coordination within global value chains. Bipartite projections allowed the deriving and analyzing of two secondary networks: one mapping connections between meatpacking plants that share certifications, and the other linking consumer nations through common supply channels. The meatpacking plant network displays high modularity, featuring two dominant clusters alongside several smaller, regionally coherent clusters. This structure reflects diverse governance capabilities and strategic certification adoptions. Conversely, the consumer nation network shows lower modularity but identifies central hubs that organize international demand and signal regulatory alignment. These patterns reveal underlying dynamics of coopetition, where actors collaborate through shared standards yet compete through innovation. By integrating the Inner Development Goals (IDG) framework, it is revealed internal capacities, such as trust, complexity awareness, and shared purpose, underpinning the efficacy of traceability systems as ethical and adaptive infrastructures. This values-based lens provides a novel perspective on how technical systems can foster resilient, inclusive, and sustainable trade, thereby contributing to planetary health and human-centered development in global livestock governance. Full article

(This article belongs to the Section Food Solutions for Health and Sustainability)

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15 pages, 9577 KB

Open AccessArticle

What Factors Influence Cardamom Farmers to Adopt a Range of Climate-Resilient Practices?

by Shreesha Pandeya, Binayak Prakash Mishra and Sushmita Bhatta

Challenges 2025, 16(4), 47; https://doi.org/10.3390/challe16040047 - 10 Oct 2025

Abstract

The hilly and mountainous regions of Nepal provide a suitable environment for the cultivation of large cardamom, a high-value cash crop with significant global market potential. However, climate change poses significant threats to its production and the livelihoods of farmers dependent on this [...] Read more.

The hilly and mountainous regions of Nepal provide a suitable environment for the cultivation of large cardamom, a high-value cash crop with significant global market potential. However, climate change poses significant threats to its production and the livelihoods of farmers dependent on this crop. To cope with these challenges, adopting climate-resilient agricultural practices is essential, particularly among smallholder farmers of rural communities. However, the extent of their implementation remains largely unknown. We surveyed 158 households in Ilam and Tehrathum districts to assess the adoption intensity of climate-resilient practices among large cardamom farmers using the Ordered Probit Model. Findings revealed considerable variation in the adoption intensity of climate-resilient practices. Traditional practices like tillering, weeding, and irrigation were highly adopted, while more innovative, knowledge-intensive methods were less adopted. Education was found to have a positive influence on the high adoption intensity of climate-resilient practices. Each additional unit of year of schooling increases the probability of high adoption of practices by 3.4%. Membership in farmers’ groups increases the likelihood of high adoption by 12.9%, while labor availability and regular extension contact rises by 21.9% and 17.8%, respectively. Similarly, age shows a smaller but significant effect, increasing adoption by 0.5% at p-value = 0.08. The use of traditional practices is common; however, the uptake of scientifically recommended practices for climate resilience remains limited. Policy initiatives focusing on farmer education, promoting farmer organizations, addressing labor shortages, and strengthening extension services are important for enhancing resilience in the large cardamom sector of Nepal. Full article

(This article belongs to the Section Social Climate, Challenges, Trends, and Transitions)

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2 pages, 421 KB

Open AccessEditorial

A New Era for Challenges: Celebrating 15 Years with a Fresh Identity as Challenges—Journal of Planetary Health

by Susan L. Prescott, David Webb and Challenges—Journal of Planetary Health Editorial Office

Challenges 2025, 16(4), 46; https://doi.org/10.3390/challe16040046 - 30 Sep 2025

Abstract

We are delighted to announce an exciting new chapter in the life of our journal [...] Full article

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19 pages, 898 KB

Open AccessArticle

Greenwashing in the Tuna Industry: Implications for Consumers, Businesses and Planetary Health

by Dan Daugaard, Sana Ejaz and Ayobolawole Adewale Ogundipe

Challenges 2025, 16(4), 45; https://doi.org/10.3390/challe16040045 - 30 Sep 2025

Abstract

Greenwashing threatens both consumer trust and the integrity of planetary health initiatives. Transparency in sustainability claims is therefore critical for promoting ecological wellbeing, strengthening food security, and fostering equitable development in the Anthropocene. This paper investigates greenwashing by adapting the Gompers Governance Index [...] Read more.

Greenwashing threatens both consumer trust and the integrity of planetary health initiatives. Transparency in sustainability claims is therefore critical for promoting ecological wellbeing, strengthening food security, and fostering equitable development in the Anthropocene. This paper investigates greenwashing by adapting the Gompers Governance Index methodology to the context of sustainability claims. The focus of our greenwashing index in this case is the sustainability claims made by canned tuna brands in Australia. The index is created from a comprehensive set of criteria for environmental claims, based on the Australian Competition and Consumer Commission (ACCC)’s principles for trustworthy claims. We show that the canned tuna brands form two clusters: one at a very high level of achievement and a second group with notable opportunities to improve on their sustainability communication and transparency. The results also highlight several key issues, most notably a lack of information regarding future sustainability transition plans across most brands. A deeper analysis of the scoring scheme shows that the brands with third-party sustainability certification generally achieved a better alignment with the ACCC principles than other brands. Future iterations of this analysis could incorporate online transparency and third-party verification to provide a more comprehensive assessment. Overall, this study underscores the need for clearer sustainability messaging, greater regulatory enforcement, and improved accountability among brands to ensure consumers can make informed choices. Full article

(This article belongs to the Section Food Solutions for Health and Sustainability)

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17 pages, 322 KB

Open AccessReview

Towards a Sustainable Circular Economy (SCE) for Nepal: Current Realities and Perspectives

by Gavin Melles, Suresh Gautam and Richan Shrestha

Challenges 2025, 16(3), 44; https://doi.org/10.3390/challe16030044 - 4 Sep 2025

Abstract

Nepal, like its South Asian neighbours, is exploring Circular Economy (CE) as a pathway to Green Economy and Net Zero commitments. Current studies focus primarily on sector-specific 3R (Reduce, Reuse, Recycle) waste management strategies. However, these approaches overlook the broader sustainability transformation implied [...] Read more.

Nepal, like its South Asian neighbours, is exploring Circular Economy (CE) as a pathway to Green Economy and Net Zero commitments. Current studies focus primarily on sector-specific 3R (Reduce, Reuse, Recycle) waste management strategies. However, these approaches overlook the broader sustainability transformation implied by a Sustainable Circular Economy (SCE). This study examines whether a locally relevant SCE model is feasible for Nepal. We conducted thematic analysis of interviews with thirteen representatives from nine CE organizations, supplemented by a literature review. Our findings reveal that while most SCE elements exist individually in Nepal’s context, integration into a comprehensive socially inclusive framework remains underdeveloped. We propose a Nepal-specific SCE framework that could challenge conventional industrial development trajectories focused solely on growth. The authors believe that this Nepal case study has valuable lessons for other developing countries pursuing CE as a strategy, as it suggests that a wider SCE scope is necessary to achieve inclusive development. Full article

(This article belongs to the Special Issue Planetary Health and the Role of Regenerative Economies, Regenerative Business and Wellbeing Economies in the Symbiosene)

24 pages, 3043 KB

Open AccessArticle

Unlocking the Potential of Reclaimed Water: Analysis of the Challenges and Market Size as a Strategic Solution for Water Scarcity in Europe

by Víctor Fabregat

Challenges 2025, 16(3), 43; https://doi.org/10.3390/challe16030043 - 4 Sep 2025

Abstract

The reclaimed water sector is poised for significant growth driven by urbanization, technological advancements, and increasing demand for alternative water sources, with an emphasis on improving treatment capacities and promoting water reuse for various applications. This study examines the challenges and market potential [...] Read more.

The reclaimed water sector is poised for significant growth driven by urbanization, technological advancements, and increasing demand for alternative water sources, with an emphasis on improving treatment capacities and promoting water reuse for various applications. This study examines the challenges and market potential of reclaimed water as a strategic solution to address water scarcity in Europe, assessing the regulatory framework, associated risks, and reuse potential. A multi-phase analysis was conducted, including a review of the European directives, an analysis of water scarcity, an evaluation of wastewater reuse potential, identification of risks and technological challenges, and segmentation of the reclaimed water market across various European regions. Results highlight the significant underutilization of treated wastewater in Europe; only about 3% of urban wastewater is reused, equal to 1 billion m³/year (2.4% of effluent, <0.5% of freshwater withdrawals). Wastewater is often regarded as a pollutant rather than a resource; yet, advances in recycling and treatment technologies have increased safety and efficiency, making it a practical solution to water scarcity while strengthening climate resilience. At the strategic level, the study concludes that Europe holds strong potential for water recovery and a substantial opportunity to tackle water scarcity through innovative recovery solutions, thereby contributing to sustainability, fostering a circular economy, and promoting planetary health. Full article

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

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1 pages, 128 KB

Open AccessRetraction

RETRACTED: Chumo et al. The Value of Community Capitals in Sustainable Urban Development: A Qualitative Exploration of Urban Informal Workers. Challenges 2024, 15, 44

by Ivy Chumo, Blessing Mberu and Caroline Kabaria

Challenges 2025, 16(3), 42; https://doi.org/10.3390/challe16030042 - 2 Sep 2025

Abstract

The journal retracts the review article “The Value of Community Capitals in Sustainable Urban Development: A Qualitative Exploration of Urban Informal Workers” [...] Full article

33 pages, 1015 KB

Open AccessArticle

Green Purchase Behavior in Indonesia: Examining the Role of Knowledge, Trust and Marketing

by Philia Vironika and Mira Maulida

Challenges 2025, 16(3), 41; https://doi.org/10.3390/challe16030041 - 30 Aug 2025

Abstract

This study investigates the factors influencing green purchase behavior in emerging economies, focusing on Indonesian consumers’ preferences for organic food products. While sustainability awareness is growing globally, limited research has examined how environmental knowledge and trust interact with marketing efforts to shape green [...] Read more.

This study investigates the factors influencing green purchase behavior in emerging economies, focusing on Indonesian consumers’ preferences for organic food products. While sustainability awareness is growing globally, limited research has examined how environmental knowledge and trust interact with marketing efforts to shape green purchasing decisions in developing market contexts like Indonesia. The research model incorporates five constructs: environmental knowledge (awareness of ecological issues), green trust (confidence in environmental claims), green marketing mix (eco-oriented strategies for product, price, place, and promotion), green purchase intention (likelihood of buying eco-friendly products), and green purchase behavior (actual sustainable buying decisions). Data from 211 valid respondents were analyzed using structural equation modeling. The results indicate that environmental knowledge directly influences green trust and the green marketing mix but not green purchase intention or behavior. Instead, it affects behavior indirectly through trust and intention. Contrary to expectations, green trust does not influence the green marketing mix, suggesting it may operate independently of marketing strategies. Similarly, the green marketing mix does not significantly influence green purchase intention or behavior, suggesting that marketing strategies alone may be insufficient in driving sustainable consumer choices. These findings highlight the important role of environmental knowledge in fostering consumer trust and indirectly guiding green purchasing behavior in emerging markets. By promoting sustainable consumption through knowledge and trust, this study offers insights into consumer behavior as a pathway to advancing planetary health. This study advances the Theory of Planned Behavior by integrating green trust and the green marketing mix to explain how trust and economic factors shape green purchasing behavior. Practical implications suggest that businesses should adopt targeted green marketing strategies, such as educational campaigns, eco-labeling, or certifications, to enhance environmental awareness, build consumer trust, and encourage sustainable purchasing decisions. This study contributes to the literature by examining how environmental knowledge indirectly influences green purchase behavior through the mediation of trust and intention within the context of an emerging market. Full article

(This article belongs to the Section Food Solutions for Health and Sustainability)

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16 pages, 295 KB

Open AccessEssay

A Manifesto for Ecological Healing: Valuing Traditional Knowledge in Mozambique

by Edgar Manuel Cambaza

Challenges 2025, 16(3), 40; https://doi.org/10.3390/challe16030040 - 26 Aug 2025

Abstract

Mozambican traditional healing is a longstanding, community-embedded practice grounded in local knowledge systems and biodiversity. Despite its resilience, it has been persistently marginalized—from colonial impositions to enduring legal ambiguities—while Western medicine, rooted in Hippocratic, Galenic, and Cartesian paradigms, has become the normative model. [...] Read more.

Mozambican traditional healing is a longstanding, community-embedded practice grounded in local knowledge systems and biodiversity. Despite its resilience, it has been persistently marginalized—from colonial impositions to enduring legal ambiguities—while Western medicine, rooted in Hippocratic, Galenic, and Cartesian paradigms, has become the normative model. This article explores the ethical, legal, and consequentialist dimensions of emancipating traditional healing, analyzing four policy options: prohibition, indifference, protection, and encouragement. Emancipation is presented not as subordination to biomedical standards but as a process of epistemic justice, affirming cultural sovereignty and community agency. Core values such as justice, equity, and respect for plural worldviews underpin the discussion. Traditional healers are often spiritually mandated and serve over 80% of the population, particularly in underserved areas, yet remain institutionally undervalued. Promoting respectful dialogue among stakeholders is crucial to avoid reductive adaptations and foster inclusive, sustainable health systems. Recognizing traditional healing as a legitimate and complementary system not only strengthens Mozambique’s National Health System (SNS) but also contributes to achieving the Sustainable Development Goals (SDGs) related to health, inclusion, and cultural rights. This article argues that empowering traditional healing is both a moral imperative and a strategic investment in planetary health and human flourishing. Full article

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

17 pages, 268 KB

Open AccessReview

Inner Dimensions of Regeneration: Mental Models, Mindsets and Cultures

by Hannah Gosnell and Ethan Gordon

Challenges 2025, 16(3), 39; https://doi.org/10.3390/challe16030039 - 15 Aug 2025

Abstract

A growing body of scholarship recognizes the importance of understanding the inner dimensions of transformations to sustainability at individual, collective, and system levels and their influence on the behavior of individuals and groups and the types of institutions that prevail. This review summarizes [...] Read more.

A growing body of scholarship recognizes the importance of understanding the inner dimensions of transformations to sustainability at individual, collective, and system levels and their influence on the behavior of individuals and groups and the types of institutions that prevail. This review summarizes and synthesizes scholarship on the inner dimensions of regeneration, a subject of growing interest in the sustainability science literature. Regeneration refers to a process of rebuilding or renewing an asset, resource, ecosystem, individual, family, organization, community, or place. It enables the expression of nature’s capacity for self-organization and empowers social-ecological systems to revive themselves through positive reinforcing cycles. The review seeks to improve understanding of the characteristics and meanings of regenerative mental models, mindsets, and cultures. It begins with definitions, then describes methods, summarizes results, and discusses what regenerative mental models and mindsets look like when they become part of culture and are scaled to larger social-ecological systems. Full article

(This article belongs to the Special Issue The Relationship between Sustainability and Inner Development: Towards More Integrative Worldviews, Paradigms, and Actions)

13 pages, 224 KB

Open AccessArticle

Piloting a Virtual Mindful Eating Program to Improve Eating Behaviors and Reduce Food Waste

by Michael F. Royer, Afton Kechter, Dara L. James, Margaret Moeller, Maricarmen Vizcaino and Christopher Wharton

Challenges 2025, 16(3), 38; https://doi.org/10.3390/challe16030038 - 4 Aug 2025

Abstract

Introduction: The wellbeing of humans and the planet is negatively impacted by unhealthy eating behaviors and excessive food waste. Mindfulness approaches have the potential to help people modify their behavior to achieve healthier outcomes. Pilot testing methods to sustainably support healthy eating and [...] Read more.

Introduction: The wellbeing of humans and the planet is negatively impacted by unhealthy eating behaviors and excessive food waste. Mindfulness approaches have the potential to help people modify their behavior to achieve healthier outcomes. Pilot testing methods to sustainably support healthy eating and reduce food waste are essential for identifying effective ways to promote human and planetary health. Methods: A pilot study was conducted to test a virtual mindful eating program to improve eating behaviors and reduce food waste among a small sample of U.S. adults. Mixed-methods approaches were used to identify the efficacy of the piloted intervention on mindfulness, eating behaviors, and food waste while identifying participant perspectives of the mindful eating program. Results: Quantitative study outcomes indicated positive intervention effects on hunger/satiety cues and food appreciation. No significant intervention effects were detected on mindfulness or food waste. Qualitative findings highlighted participant reports of experiencing greater self-awareness, an improved relationship with food, and a sense of creativity with meal preparation. Conclusions: This pilot study tested a novel mindful eating program that improved eating behaviors related to hunger/satiety and increased food appreciation. The program was accepted by participants, but it did not increase mindfulness or reduce food waste. Future iterations of this mindful eating program will require modifications to test different approaches for increasing mindfulness and reducing food waste while expanding the positive effects on healthy eating. Full article

(This article belongs to the Section Food Solutions for Health and Sustainability)

24 pages, 3140 KB

Open AccessReview

Social, Economic and Ecological Drivers of Tuberculosis Disparities in Bangladesh: Implications for Health Equity and Sustainable Development Policy

by Ishaan Rahman and Chris Willott

Challenges 2025, 16(3), 37; https://doi.org/10.3390/challe16030037 - 4 Aug 2025

Abstract

Tuberculosis (TB) remains a leading cause of death in Bangladesh, disproportionately affecting low socio-economic status (SES) populations. This review, guided by the WHO Social Determinants of Health framework and Rockefeller-Lancet Planetary Health Report, examined how social, economic, and ecological factors link SES to [...] Read more.

Tuberculosis (TB) remains a leading cause of death in Bangladesh, disproportionately affecting low socio-economic status (SES) populations. This review, guided by the WHO Social Determinants of Health framework and Rockefeller-Lancet Planetary Health Report, examined how social, economic, and ecological factors link SES to TB burden. The first literature search identified 28 articles focused on SES-TB relationships in Bangladesh. A second search through snowballing and conceptual mapping yielded 55 more papers of diverse source types and disciplines. Low-SES groups face elevated TB risk due to smoking, biomass fuel use, malnutrition, limited education, stigma, financial barriers, and hazardous housing or workplaces. These factors delay care-seeking, worsen outcomes, and fuel transmission, especially among women. High-SES groups more often face comorbidities like diabetes, which increase TB risk. Broader contextual drivers include urbanisation, weak labour protections, cultural norms, and poor governance. Recommendations include housing and labour reform, gender parity in education, and integrating private providers into TB programmes. These align with the WHO End TB Strategy, UN SDGs and Planetary Health Quadruple Aims, which expand the traditional Triple Aim for health system design by integrating environmental sustainability alongside improved patient outcomes, population health, and cost efficiency. Future research should explore trust in frontline workers, reasons for consulting informal carers, links between makeshift housing and TB, and integrating ecological determinants into existing frameworks. Full article

(This article belongs to the Section Human Health and Well-Being)

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14 pages, 1859 KB

Open AccessArticle

Into the Blue: An ERC Synergy Grant Resolving Past Arctic Greenhouse Climate States

by Jochen Knies, Gerrit Lohmann, Stijn De Schepper, Monica Winsborrow, Juliane Müller, Mohamed M. Ezat and Petra M. Langebroek

Challenges 2025, 16(3), 36; https://doi.org/10.3390/challe16030036 - 30 Jul 2025

Abstract

The Arctic Ocean is turning blue. Abrupt Arctic warming and amplification is driving rapid sea ice decline and irreversible deglaciation of Greenland. The already emerging, substantial consequences for the planet and society are intensifying and yet, model-based projections lack validatory consensus. To date, [...] Read more.

The Arctic Ocean is turning blue. Abrupt Arctic warming and amplification is driving rapid sea ice decline and irreversible deglaciation of Greenland. The already emerging, substantial consequences for the planet and society are intensifying and yet, model-based projections lack validatory consensus. To date, we cannot anticipate how a blue Arctic will respond to and amplify an increasingly warmer future climate, nor how it will impact the wider planet and society. Climate projections are inconclusive as we critically lack key Arctic geological archives that preserved the answers. This “Arctic Challenge” of global significance can only be addressed by investigating the processes, consequences, and impacts of past “greenhouse” (warmer-than-present) climate states. To address this challenge, the ERC Synergy Grant project Into the Blue (i2B) is undertaking a program of research focused on retrieving new Arctic geological archives of past warmth and key breakthroughs in climate model performance to deliver a ground-breaking, synergistic framework to answer the central question: “Why and what were the global ramifications of a “blue” (ice-free) Arctic during past warmer-than-present climates?” Here, we present the proposed research plan that will be conducted as part of this program. Into the Blue will quantify cryosphere (sea ice and land ice) change in a warmer world that will form the scientific basis for understanding the dynamics of Arctic cryosphere and ocean changes to enable the quantitative assessment of the impact of Arctic change on ocean biosphere, climate extremes, and society that will underpin future cryosphere-inclusive IPCC assessments. Full article

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16 pages, 615 KB

Open AccessArticle

Young People’s Perspectives on Climate Change in Urban Brazil

by Irene Rizzini and Mariana Menezes Neumann

Challenges 2025, 16(3), 35; https://doi.org/10.3390/challe16030035 - 21 Jul 2025

Abstract

The climate crisis poses profound risks to present and future generations. Nonetheless, the perspectives of children and young people internationally, and more specifically in Brazil, remain underexplored. Based on a multi-discipline literature review on climate anxiety and nature (dis)connectedness, the hypothesis is that [...] Read more.

The climate crisis poses profound risks to present and future generations. Nonetheless, the perspectives of children and young people internationally, and more specifically in Brazil, remain underexplored. Based on a multi-discipline literature review on climate anxiety and nature (dis)connectedness, the hypothesis is that the effects and symptoms of increasing (dis)connection with natural environments have short-, medium-, and long-term consequences. Access to natural spaces is a vital response to counteract the negative impacts of climate change. This article discusses findings from a study conducted in urban Brazil with 200 young people aged 12 to 18 years old, with the aim of addressing three research questions from ten questions that comprised the complete survey. The major research questions were as follows: 1. ‘Climate change worries me’: How do you relate to this statement? 2. How does climate change affect you?, and 3. Do you think some young people are more affected by climate change than others? The results show that young people care about and are preoccupied with climate change, especially when they reflect on their futures and the future generations. Although young participants are deeply concerned about climate change and feel its effects personally in the form of anxiety, fear, and insecurity, they often lack clear pathways for contributing to broader environmental efforts beyond individual actions. These findings highlight an urgent need to foster community-based approaches and enhance education and resources for enlarging and improving youth engagement, especially to rethink the everyday strategies addressing these challenges, and to foster new paradigms of interaction with the natural world based on (re)connection with natural spaces. The correlation between climate anxiety and nature (dis)connection offers an approach that is still little explored, especially concerning children and young people. Full article

(This article belongs to the Special Issue Planetary Health: From Evidence to Action–Confronting Reality (Including Submissions Associated with the 2024 Planetary Health Summit (PHAM2024))

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20 pages, 2652 KB

Open AccessArticle

Moderate Impact of Increasing Temperatures on Food Intake in Human Populations

by Per M. Jensen and Marten Sørensen

Challenges 2025, 16(3), 34; https://doi.org/10.3390/challe16030034 - 21 Jul 2025

Abstract

Increasing temperatures associated with climate change will lead to (periodic) temperature-induced reductions in food intake in human and other mammal populations. Human adults, however, are both tolerant and resilient to periodic nutritional deficits, and the associated health effects should be limited. Intermittent nutritional [...] Read more.

Increasing temperatures associated with climate change will lead to (periodic) temperature-induced reductions in food intake in human and other mammal populations. Human adults, however, are both tolerant and resilient to periodic nutritional deficits, and the associated health effects should be limited. Intermittent nutritional deficits may also cause growth restriction in developing foetuses and young children, which potentially affects their food intake in later life. Therefore, temperature-induced hypophagia can be hypothesised to manifest as later compensatory responses with multiple concomitant (or extended) lags of varying temporal dimensions. We examined the relationship between calorie intake and ambient outdoor temperatures for a time series covering past decades (FAO data for 1961–2013) in 80 countries to determine if humans alter their food intake in response to elevated temperatures. We included eleven different temporal “windows of exposure” of varying lag. These windows considered current and recent exposure, just as lagged effects allowed for a consideration of past effects on mothers, their children, and childhood exposure. It was hypothesised that one of these could provide a basis for predicting future changes in human calorie intake in response to climate change. Our analyses showed no apparent association with temperatures in ten of the eleven hypotheses/models. The remaining hypothesis suggests that current calorie intake is linked to decadal mean temperatures with a lag of approximately three decades, pointing to an impact on mothers and their (developing) children. The impact of an increase in mean temperature varies with temperature amplitudes, and negative impacts are only found in countries with low temperature amplitudes (warmer countries), albeit the impact on calorie intake caused by a 2–3 °C change in temperatures or temperature amplitudes is generally modest. However, in considering calorie intake, we only address quantities of food (with unspecified quality), which insufficiently reflect the full range of nutritional challenges associated with increasing temperatures. Understanding climate-driven changes in human food intake requires global interdisciplinary collaboration across public health, environmental science, and policy. Full article

(This article belongs to the Section Human Health and Well-Being)

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10 pages, 1134 KB

Open AccessViewpoint

McDonald’s McLean Deluxe and Planetary Health: A Cautionary Tale at the Intersection of Alternative Meats and Ultra-Processed Marketing

by Susan L. Prescott and Alan C. Logan

Challenges 2025, 16(3), 33; https://doi.org/10.3390/challe16030033 - 17 Jul 2025

Abstract

Dietary choices and patterns have enormous consequences along the lines of individual, community, and planetary health. Excess meat consumption has been linked to chronic disease risk, and at large scales, the underlying industries maintain a massive environmental footprint. For these reasons, public and [...] Read more.

Dietary choices and patterns have enormous consequences along the lines of individual, community, and planetary health. Excess meat consumption has been linked to chronic disease risk, and at large scales, the underlying industries maintain a massive environmental footprint. For these reasons, public and planetary health experts are unified in emphasizing a whole or minimally processed plant-based diet. In response, the purveyors of ultra-processed foods have added “meat alternatives” to their ultra-processed commercial portfolios; multinational corporations have been joined by “start-ups” with new ultra-processed meat analogues. Here, in our Viewpoint, we revisit the 1990s food industry rhetoric and product innovation, a time in which multinational corporations pushed a great “low-fat transition.” We focus on the McLean Deluxe burger, a carrageenan-rich product introduced by the McDonald’s Corporation in 1991. Propelled by a marketing and media-driven fear of dietary fats, the lower-fat burger was presented with great fanfare. We reflect this history off the current “great protein transition,” a period once again rich in rhetoric, with similar displays of industry detachment from concerns about the health consequences of innovation. We scrutinize the safety of carrageenan and argue that the McLean burger should serve as a cautionary tale for planetary health and 21st century food innovation. Full article

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Challenges — Journal of Planetary Health

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