Accelerated decarbonization of academic conferences is necessary and urgent. Despite the window of opportunity that COVID-19 created for rethinking conferences, there is a risk of slipping back into old habits now that restrictions are lifted. This commentary reports on recent experiences with a unique, sustainable approach to academic conferencing involving an international partnership and hub model across three continents. There is a need to continue to experiment with and implement new modes of sustainable academic conferencing.

In response to increasing demands to move away from carbon-intensive academic conferences, and a need to address social justice issues, the author-team designed, implemented, and experimented with a new conference model. Three key-design choices informed the model. First, instead of the common single-host-single-location approach, we established a partnership between three universities across three continents. Second, we adopted a hub model of three online conference days, followed by three non-hybrid, in-person only conference days. Third, we sought to accommodate global participation by organizing each of the online conference days during daylight hours in the respective time zones. We find that the model promotes less air travel and improved global south participation. Our approach adds to a growing number of experiments with new modes of academic conferencing in a world that is facing climate and inequality crises.

Decarbonizing academic conferences is necessary and urgent. This commentary reveals experiences with a hub-based format.

Despite growing recognition of the importance of transdisciplinary research in addressing complex sustainability challenges, in practice it has been much hampered by persistent inequities, power disparities, and epistemological disconnect. Planetary health as an emerging field offers a unique lens highlighting the need for knowledge integration across the environment, health, and development (EHD) nexus. Drawing upon extensive analyses, including a meta-analysis of existing transdisciplinary frameworks, a literature review of practices in these fields, and a case study of a planetary health action research project in Indonesia and Fiji, we propose a framework to guide the design and implementation of transdisciplinary research.

The proposed framework was iteratively designed, starting with existing frameworks, complemented by findings and practice recommendations from a literature review of 36 publications of recent transdisciplinary practices in the EHD fields and an in-depth case study of a planetary health research from Indonesian perspectives. The practice framework focuses on the stakeholder collaboration process, and emphasizes reflexivity and co-learning throughout all research phases: initiation (co-design); implementation (adaptive co-management), and monitoring and refinement (co-monitoring). Foundational considerations for stakeholder engagement could inform process design by reflecting on stakeholder contributions, interactions, integration, and expected outcomes. As suggested by development studies, and implicitly agreed upon but insufficiently elaborated within environment and health, attention to the local context of the research, mapping of power dynamics, and the values of equity and inclusivity are pertinent if research is to produce credible, relevant, and legitimate knowledge and outcomes. A renewed focus on addressing power equities can help ensure stakeholders' perspectives and interests are equally valued and potential solutions are not inadvertently excluded as a legacy of systemic power imbalance. The practice framework is most effectively applied in the initial process co-design, by process initiators and funders assessing proposals for international transdisciplinary research in power-diverse settings or resource-poor contexts.

How can researchers across diverse fields collaborate with renewed focus on power inequities to accelerate progress towards the Sustainable Development Goals?

Engaging with economic questions is crucial for sustainability science to maintain its transformative potential. By recognizing the impact of continuous economic growth on environmental problems, the concept of degrowth proposes a practical approach to achieving sustainability. It urges experts in sustainability to think carefully about the impacts of economic growth, echoing recent scientific findings that question the need for endless growth. Therefore, this article highlights the potential of degrowth as a transformative approach that can expand capacities necessary for socio-ecological sustainability.

This article highlights the potential of degrowth as a transformative approach that can expand capacities necessary for socio-ecological sustainability. By addressing economic growth as a fundamental driver of unsustainability, degrowth offers a concrete pathway toward achieving sustainable outcomes. It calls for sustainability scientists to explicitly consider the role of economic growth, aligning with recent scientific assessments that support a critical stance on growth. Although degrowth and sustainability share common goals such as respecting biocapacity and equitable distribution of ecological budgets, degrowth approaches differ by placing emphasis on national and local solutions and exploring aspects such as technology, time, work, commodity, and property. Engaging with economic questions is crucial for sustainability science to maintain its transformative potential. Growth-critical perspectives such as degrowth and post-growth have the potential to propel sustainability discourses into new, more impactful realms of development.

Engaging with economic questions is crucial for sustainability science to maintain its transformative potential. Degrowth proposes a practical approach for achieving sustainability.

Scientists often argue that today's efforts towards sustainability in cities call for a strong exchange on knowledge with non-scientific actors. But do urban practitioners think the same way? Do they see the need for scientific support in their work? In our research, we directly asked these questions to urban practitioners. This article evolves around their answers and describes the activities we conducted in order to start the necessary discussion with them.

Given the challenges cities are facing in their efforts towards sustainability, we scrutinize if urban practitioners believe that scientific knowledge can support them in implementing the Sustainable Development Goals (SDGs), and if, how. To find evidence, we conducted a ‘co-design’ approach in Future Earth in terms of knowledge production, targeting at German cities. In consequence, the aims of this article are twofold. First, we aim at describing the implementation of the co-design process itself as a potentially useful tool for the interaction with urban practitioners and the evaluation of their specific needs. Second, we present the main results of the co-design process and its contribution for SDG implementation in cities. Combining the two aims, we argue for novel research approaches that allow for more collaborative activities as well as for adequate funding opportunities in the light of urban sustainability transformations.

Co-design to support SDG implementation in cities towards sustainability transformations.

Evolutionary biology considers how organisms and populations change over multiple generations, and so is naturally focused on issues of sustainability through time. Yet, sustainability science rarely incorporates evolutionary thinking and most scientists and policy makers do not account for how evolutionary processes contribute to sustainability. Understanding the interplay between evolutionary processes and nature's contribution to people is key to sustaining life on Earth.

Evolution, the change in gene frequencies within populations, is a process of genetically based modification by descent, providing the raw material essential for adaptation to environmental change. Therefore, it is crucial that we understand evolutionary processes if we aim for a sustainable planet. We here contribute to this development by describing examples of contemporary, rapid evolutionary changes of concern for sustainability, specifically highlighting the global spread of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and how the evolutionary toolbox allowed tracking the origins and evolution of SARS-CoV-2 in real time and predicting potential future outbreaks. We also consider how urban development accelerates evolutionary processes such as altered phenotypic and physiological changes and the spread of infectious and zoonotic diseases. We show the importance of evolutionary concepts and techniques for public-health decision making. Many examples of the potential of evolutionary insights contributing to crucial sustainability challenges exist, including infectious and zoonotic diseases, ecosystem and human health, and conservation of natural resources. We thus join recent calls advocating for a stronger collaboration between evolutionary biologists and the sustainability community, increasing interdisciplinarity and the awareness about the knowledge of evolutionary processes for decision making and policies.

Evolution is fundamental to sustaining life on Earth and should be incorporated in sustainability measures and policies.

Climate change threatens tropical forests, ecosystem services, and indigenous peoples. The effects of climate change will force the San Blas Island communities of the indigenous Guna people to relocate to one of the most extensive, intact forests in Panama. In this paper, we argue that the impacts of climate change, and the proposed resettlement, will synergistically affect the jaguar. As apex predators, jaguars are sensitive to landscape change and require intact forests with ample prey to survive. Proactively planning for the intrinsically related issues of climate change, human displacement, and jaguar conservation is a complex but essential management task.

Tropical rainforest, coastal, and island communities are on the front line of increasing temperatures and sea-level rise associated with climate change. Future impacts on the interconnectedness of biological and cultural diversity (biocultural heritage) remain unknown. We review the interplay between the impacts of climate change and the displacement of the indigenous Guna people from the San Blas Islands, the relocation back to their mainland territory, and the implications for jaguar persistence. We highlight one of the most significant challenges to using resettlement as an adaptive strategy to climate change, securing a location where the Guna livelihoods, traditions, and culture may continue without significant change while protecting ecosystem services (e.g. biodiversity, carbon sequestration, and water). We posit that developing management plans that strive to meet social needs without sacrificing environmental principles will meet these objectives.

A biocultural approach increases adaptive capacity for ecological and human social systems threatened by climate change.

Human societies are changing where and how water flows through the atmosphere. However, these changes in the atmospheric water cycle are not being managed, nor is there any real sense of where these changes might be headed in the future. Thus, we develop a new economic theory of atmospheric water management, and explore this theory using creative story-based scenarios. These scenarios reveal surprising possibilities for the future of atmospheric water management, ranging from a stock market for transpiration to on-demand weather. We discuss these story-based futures in the context of research and policy priorities in the present day.

Humanity is modifying the atmospheric water cycle, via land use, climate change, air pollution, and weather modification. Historically, atmospheric water was implicitly considered a ‘public good’ since it was neither actively consumed nor controlled. However, given anthropogenic changes, atmospheric water can become a ‘common-pool’ good (consumable) or a ‘club’ good (controllable). Moreover, advancements in weather modification presage water becoming a ‘private’ good, meaning both consumable and controllable. Given the implications, we designed a theoretical framing of atmospheric water as an economic good and used a combination of methods in order to explore possible future scenarios based on human modifications of the atmospheric water cycle. First, a systematic literature search of scholarly abstracts was used in a computational text analysis. Second, the output of the text analysis was matched to different parts of an existing economic goods framework. Then, a group of global water experts were trained and developed story-based scenarios. The resultant scenarios serve as creative investigations of the future of human modification of the atmospheric water cycle. We discuss how the scenarios can enhance anticipatory capacity in the context of both future research frontiers and potential policy pathways including transboundary governance, finance, and resource management.

Story-based scenarios reveal novel future pathways for the management of the atmospheric water cycle.

By the end of 2020, 190 universities and colleges worldwide had publicly committed to divest partially or fully from fossil fuel holdings, to help mitigate global heating. We find a statistical correlation between the status of universities in the world rankings and decisions to divest endowments from fossil fuel. Further analysis suggests causation in both directions. Not only do the best divest, but divestors get better.

Previous studies have explored connections between environmental responsibility and the financial performance of business firms. Here, we explore connections between a particular form of environmental responsibility, divestment from fossil fuel, and the reputational status of a different form of organization, universities. We find a strong and robust link between world university rankings and commitments to divest endowments from the fossil fuel industry, with higher-ranked universities divesting at higher rates compared to lower-ranked universities. Rates of divestment also differ significantly between countries, and according to the political orientations of provinces and states. We do not find evidence for links between divestment treated as a binary variable and a university's number of students, size of endowment, or type of endowment. We use time lags to test whether the rank-divestment correlation may arise due to effects of rank on divestment and/or vice versa. These tests indicate influence in both directions. In light of these results, we predict universities that have not yet divested will face mounting peer pressure to do so.

Higher-ranked universities divest more frequently, and divesting universities improve more in the rankings.

Global conflicts and the pandemic reveal the risks of food import reliance. In the UK, pandemic, Brexit, and Ukraine war caused food price spikes. To bolster food security, the UK needs to produce and consume more domestically, including nutrient-rich bivalve mollusks. Current mollusk exports hinder domestic food sources. Promoting domestic consumption through convenient, attractive products and taxing unhealthy processed foods can help. Reducing reliance on food trade is crucial amid global instability and climate change. The UK's mollusk export issues illustrate food security risks of excessive reliance on international trade.

Here we examine the critical issue of food security in the context of international volatility, emphasizing the risks associated with an excessive reliance on food trade. The UK's experience with disruptions caused by the pandemic, Brexit, and the Ukraine war, resulting in a significant surge in food prices, serves as a pertinent case study. The research underscores the potential benefits of increasing domestic food production and consumption to enhance resilience against global events. The UK's current production, export, and import statistics are analyzed, with a particular focus on the fish and seafood sector. The study highlights the bivalve mollusk industry, such as blue mussels, as an example of an underutilized domestic resource. Bivalve mollusks are rich in essential micronutrients, yet their consumption in the UK is low compared to other countries. We propose strategies to boost domestic demand, including incorporating bivalve meat into processed food products, utilizing advanced technologies to improve taste and texture, and government intervention through taxes on unhealthy processed foods to promote better nutritional profiles. In summary, the study emphasizes the need for greater self-sufficiency in food production to mitigate vulnerabilities resulting from an overreliance on food trade in the context of international conflicts and climate change.

Failure to effectively utilize domestic food resources and overreliance on trade threatens food security in an increasingly volatile world.

The popularity of the term polycrisis suggests a growing demand for new thinking about the world's intersecting crises, but loose and haphazard uses of the concept impede knowledge generation. The special issue, ‘Polycrisis in the Anthropocene’, aims to close the gap. This introductory comment first elaborates upon three key contributions of the lead article ‘Global Polycrisis: The Causal mechanisms of Crisis Entanglement’: a conceptualization of crisis as systemic disequilibrium; the distinction between the slow-moving stresses and the fast-moving trigger events that interact to generate a crisis; and a grammar with which to map the causality of crisis interactions. The commentary then explores three key debates around the polycrisis concept: Are we in a polycrisis, at risk of a polycrisis, or neither? Is the present polycrisis truly unique and unprecedented? And where are power and agency in a systemic approach to polycrisis? These ongoing debates suggest promising directions for polycrisis research that could feature in this special issue and advance the field of polycrisis analysis.

This commentary introduces the special issue ‘Polycrisis in the Anthropocene’ by elaborating upon three major contributions of its lead article, ‘Global Polycrisis: The Causal Mechanisms of Crisis Entanglement’, and exploring three key debates surrounding the polycrisis concept. It invites others to contribute to the special issue in order to advance polycrisis analysis, build a community of knowledge and practice, and generate new insights and strategies with which to address the world's worsening crises.

The popularity of the term polycrisis suggests a growing demand for new thinking about the world's intersecting crises, but loose and haphazard uses of the concept impede knowledge generation. The special issue, ‘Polycrisis in the Anthropocene’, aims to close the gap. This introductory comment first elaborates upon three key contributions of the lead article ‘Global Polycrisis: The Causal mechanisms of Crisis Entanglement’: a conceptualization of crisis as systemic disequilibrium; the distinction between the slow-moving stresses and the fast-moving trigger events that interact to generate a crisis; and a grammar with which to map the causality of crisis interactions. The commentary then explores three key debates around the polycrisis concept: Are we in a polycrisis, at risk of a polycrisis, or neither? Is the present polycrisis truly unique and unprecedented? And where are power and agency in a systemic approach to polycrisis? These ongoing debates suggest promising directions for polycrisis research that could feature in this special issue and advance the field of polycrisis analysis.

Inviting contributions and debates to Global Sustainability journal's special issue ‘Polycrisis in the Anthropocene’.

Brazil – one of the world's largest biocultural diversities – faces high rates of habitat loss, social inequality, and land conflicts impacting indigenous and local peoples. To challenge that, Brazilian sustainability science and education needs to be strengthened. We searched for elements in ongoing bottom-up sustainability social movements that can help serve that purpose. We found values, contents, and attitudes that, if incorporated into Brazilian sustainability science and education, can assist its transformative potential by reflecting local voices and critically engaging with (often-hegemonic) northern concepts.

In Brazil, a strong sustainability science and education is required to confront ‘glocal’ issues such as zoonotic pandemics and climate change, which are worsened by rampant ecosystem loss and social vulnerability. However, a largely disciplinary university system has been slow to meet these urgent needs. To address if and how dialogical processes with non-academics can prompt integration between distinct types of knowledge, we analyze four bottom-up sustainability initiatives that promote dialogues between science, the arts, religion, youth, and indigenous and local knowledge, and reflect on lessons learnt with movement organizers, scientists, and educators – the authors of this paper. Although sustainability science produced in dialogue with other forms of knowledge is still emerging in Brazil, we find that bottom-up initiatives outside academia can inspire science and education to approach sustainability as wholeness – a state of balance to be fulfilled when reached individually, collectively, and cosmically. We discuss how to approach a transdisciplinary and reflexive attitude in Brazilian sustainability science and education, and highlight its unique contribution to frontier topics in global sustainability debates.

Social movements’ values, contents, and attitudes can inspire transformative Brazilian sustainability science and education.

Small and medium enterprises generate an elevated environmental footprint, which requires green transformation to achieve sustainable development. The purpose of this study is to describe the intervention process in 120 microenterprises with the aim of improving environmental and sustainability performance in four categories: sustainability, water, energy and solid waste management to determine the importance to promote the sustainability process in this sector as a key factor to contribute to the inclusion and sustainable development.

Global small and medium enterprises (SMEs) represent 90% of global business, creating and maintaining 50% of employment, and in emerging economies, formal SMEs provide 40% of the national gross domestic product and the gap of productivity is approximately 7% of global gross domestic product with respect to large firms. This study analyses the strategies and possibilities to improve sustainability in 120 microenterprises. The project included five stages: the postulation, selection and enrolment; sustainability diagnosis; action plan formulation; the results of implementation and evaluation and the feedback on results. This study demonstrated the importance of integrating sustainability into the business to improve productivity, competitiveness and access to new markets; in many cases, the microentrepreneur is unaware of all possibilities offered by having environmentally friendly processes, which was shown with evidence throughout the study. Approximately 242 action plans were implemented, achieving multiple results that involved knowledge of processes and equipment of microenterprises to measure and improve their environmental performance. The findings of this study demonstrated that microenterprises require adequate support and financial programmes that should be designed and implemented by policymakers with the aim of strengthening this sector, decreasing poverty and promoting sustainable economic growth, environmentally friendly processes and development in developing countries.

Microenterprises have an important role in the economy and have the potential to achieve sustainability processes.

When developing and deploying negative emissions technologies (NETs), little attention has been paid to where. On the one hand, one might develop NETs where they are likely to contribute most to global mitigation targets, contributing to a global climate solution. On the other hand, one might develop NETs where they can help support development on a regional basis, justified by regional demands. I defend these arguments and suggest that they reflect the values of efficiency and responding to need, respectively. To the extent that these values conflict, they introduce what I call the Need-Efficiency Trade-off Effect (‘NET Effect’).

Unlike other geoengineering methods, the effectiveness of negative emissions technologies (NETs) tends to be sensitive to regional siting. This paper argues that this point raises morally and legally important implications by identifying a trade-off between ‘efficiency’ and ‘need’. First, it introduces two arguments justifying NETs: one focused on contributions to global mitigation and the other focused on contributions to regional development. Second, reflecting the two arguments, the paper discusses the moral values of efficiency and need, respectively. For instance, if the strategy is to try to use NETs to maximize expected mitigation contributions to reflect efficiency, then deployment should occur in regions with the best prospects for success (e.g. Western countries). However, if the strategy is to try to use NETs to improve the chances of simultaneous development and mitigation to respond to need, then deployment should occur in regions with limited development and expected growth of demand for NETs (e.g. Asian countries). When these values conflict, I call that a Need-Efficiency Trade-off Effect (‘NET Effect’). The paper concludes by considering the NET Effect in the context of bioenergy with carbon capture and storage as well as direct air carbon capture and storage.

Should negative emissions technologies be deployed in Western countries for most climate action or Asian where needed for development?

Changes in language used in long term climate policy can undermine their credibility and discourage climate action. Previous IPCC reports have promoted an idea of reaching ‘global net zero’ (GNZ) emissions by 2050 in order to limit global warming to 1.5 °C. In the latest IPCC Report, this language has been changed.

To understand the impact of this change, we survey COP 26 participants to test their willingness to accept a shift in long term policy goals. We find a low tolerance for a change and, indeed, there is substantial finance, business and political effort behind the idea of reaching GNZ by 2050.

This suggests that GNZ by 2050 will remain central to climate action.

Consistency in language in long term policy goals is central to building a (political) constituency in support of the Paris Agreement. Changes in language can undermine policy credibility, and stall effective mitigation action.

Recent changes in IPCC language to describe ‘global net zero’ (GNZ) as being reached in the ‘early or mid 2050s’ (AR6 WG1) could risk undermining the substantial cultural, political and financial momentum that has developed behind the interpretation – first developed by the IPCC SR 1.5 °C Report – that GNZ must be reached by 2050.

We survey COP 26 participants to test their willingness to accept a shift in policy goals and find a strong preference for a ‘stable’ long term policy target, widely interpreted as reaching ‘GNZ by 2050’, and a rejection of flexibility in long term policy targets, even as new scientific information becomes available.

‘GNZ by 2050’ is no longer a science based target, but has transitioned to a cultural and political metaphor actively used by stakeholders to guide their climate decision making. This makes ‘GNZ by 2050’ no less valid than the original scientific concept. This may stimulate further ‘political calibration’ or between the policy and modelling communities.

Sig. momentum is behind global net zero by 2050.Will changes in IPCC mitigation language de-rail global climate action?

Climate stabilization requires scaling-up technologies to capture and store carbon. Carbon removal could be very profitable, and some of the agents best placed to benefit are ‘carbon majors’, i.e. fossil fuel companies. We argue that in ordinary circumstances only agents without significant historical climate responsibilities would be entitled to the full benefits from carbon removal. Under non-ideal conditions, carbon majors might be entitled to benefit, provided that no other agent could remove similar quantities of carbon at similar costs. This burden of proof is only likely to be met in countries with poor governance capacities.

Climate stabilization requires scaling up technologies to capture and store carbon. Some of the agents best placed to profit from carbon removal are ‘carbon majors’, especially fossil fuel companies. Yet incentivizing carbon majors to undertake carbon removal poses an ethical dilemma: carbon majors have made significant historical contributions to climate change and have significantly benefitted from such contributions without being made to compensate for resulting climate harm. This is why it seems unfair to reward them with additional economic benefits. However, carbon majors possess the technological skills and infrastructure to upscale carbon removal efficiently. We argue that in ordinary circumstances, only agents without significant climate responsibilities would be morally entitled to fully benefit from carbon removal. Yet under non-ideal conditions, it might be permissible to reward carbon majors if no other agent were capable of removing as much carbon at similar costs and on similar timeframes. We believe this argument faces an imposing burden of proof that is only likely to be met in countries with poor governance capacities. In more favorable circumstances, including those of most OECD countries, rewarding carbon majors without having them pay for their historical climate responsibilities remains impermissible.

Rewarding carbon majors to undertake carbon dioxide removal is unjust due to their historical climate responsibilities. Where possible, governments should empower other agents to remove CO2.