Bethanie Carney Almroth’s research while affiliated with University of Gothenburg and other places

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Publications (59)


Figure 1: The Plastics Pollution Impact-Pathway with a social-ecological framing. The science-policy interface now recognizes environmental
Identifying and overcoming social-ecological barriers to ending plastics pollution
  • Preprint
  • File available

May 2025

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74 Reads

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Bethanie Carney Almroth

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[...]

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Jenna Jambeck

Plastics are deeply embedded in contemporary life, and their production and pollution contribute to irreversible harm across ecological and social systems. Recognized as a “novel entity” in the Planetary Boundaries framework, plastics challenge traditional governance models due to their chemical complexity and diversity, cross-sectoral impacts, and pushback from powerful political and economic actors. This study addresses urgent science-policy gaps through a structured expert elicitation, conducted during the ongoing negotiations on the global plastics treaty. We present the Experts Multi-Issue Knowledge Elicitation (EMIKE) method - a flexible, co-productive approach that addresses social-ecological dimensions of plastics pollution. Through a three-phase process involving 21 interdisciplinary experts, we identified 21 critical issue areas spanning toxic chemical use, social inequality, overconsumption, climate impacts, and financing and policy incoherence, among others. The EMIKE process generated a matrix of interrelated indicators across plastics’ life cycle to inform adaptive, more comprehensive, just, and evidence-based policymaking. EMIKE offers a methodology for surfacing often neglected issues in natural science driven studies, fostering interdisciplinary dialogue, and advancing policy-relevant knowledge. It enables structured elicitation - attuned to power, uncertainty, and evolving political contexts - to better integrate diverse science inputs into global governance. This approach is essential not only for plastics governance, but also for any multifaceted sustainability issue requiring intersectional, systems-based solutions. Key findings highlight the inseparability of ecological and social concerns, the limits of technocratic quantification, and the need to democratize science-policy interfaces. Experts emphasized the importance of precautionary action, transparency, and justice-based governance to counteract corporate influence and systemic inertia. Our study also illustrates how scientific frameworks can support policy development by adequately considering the complexity of global sustainability challenges.

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Plastics matter in the food system

March 2025

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68 Reads

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3 Citations

Agriculture and food systems are major sources of plastic pollution but they are also vulnerable to their diverse lifecycle impacts. However, this problem is not well-recognized in global policy and scientific discourse, agendas, and monitoring of food systems. The United Nations-led Global Plastics Treaty, which has been under negotiation since 2022, is a critical opportunity to address pollution across the entire plastics lifecycle for more sustainable and resilient food systems. Here, we offer aspirational indicators for future monitoring of food systems’ plastics related to (1) plastic polymers and chemicals, (2) land use, (3) trade and waste, and (4) environmental and human health. We call for interdisciplinary research collaborations to continue improving and harmonising the evidence base necessary to track and trace plastics and plastic chemicals in food systems. We also highlight the need for collaboration across disciplines and sectors to tackle this urgent challenge for biodiversity, climate change, food security and nutrition, health and human rights at a whole systems level.



Addressing the toxic chemicals problem in plastics recycling

January 2025

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129 Reads

Ongoing policy negotiations, such as the negotiations for a future global plastics treaty, include calls for increased recycling of plastics. However, before recycling of plastics can be considered a safe practice, the flaws in today’s systems must be addressed. Plastics contain a vast range of chemicals, including monomers, polymers, processing agents, fillers, antioxidants, plasticizers, pigments, microbiocides and stabilizers. The amounts and types of chemicals in plastics products vary, and there are little requirements for transparency and reporting. Additionally, they are inherently contaminated with reaction by-products and other nonintentionally added substances (NIASs). As the chemical composition of plastics wastes is largely unknown, and many plastics chemicals are hazardous, they therefore hinder safe recycling since recyclers are not able to exclude materials that contain hazardous chemicals. To address this problem, we suggest the following policy strategies: 1) improved reporting, transparency and traceability of chemicals in plastics throughout their full life cycle; 2) chemical simplification and group-based approaches to regulating hazardous chemicals; 3) chemical monitoring, testing and quality control; 4) economic incentives that follow the waste hierarchy; and 5) support for a just transition to protect people, including waste pickers, impacted throughout the plastics life cycle.






Citations (41)


... It is vital to acknowledge the necessity of demonstrating fortitude in confronting the inescapable reality that the environment is becoming a primary cause of human illness [10][11][12][13]. Moreover, there is a pressing need to assume responsibility for the aspects of our environment that are within our capacity to modify, and to proactively initiate transformative changes [14]. This can only be achieved when researchers defy themselves and take their avant-garde thinking to societies. ...

Reference:

Thinking Beyond Food to Nutrition and Beyond Cells to Immunology
Plastics matter in the food system

... The global per capita consumption of plastic is growing, and to date plastic mitigation and regulation measures have been unsuccessful in stemming plastic leakage into the marine environment. Plastics are thus recognised as one of the world's most intractable socio-environmental challenges [8]. Representatives from 175 countries will meet in Geneva, Switzerland (5)(6)(7)(8)(9)(10)(11)(12)(13)(14) August 2025) for the second part of the fifth session (INC-5.2) to negotiate a global treaty to end plastic pollution that comprehensively addresses the full life cycle of plastic, including its production, design, and disposal. ...

Independent Science Key to Breaking Stalemates in Global Plastics Treaty Negotiations

... More than 267 species were reported to be influenced by plastic waste, especially 86% of turtles, 44% of birds, 43% of mammals, and various fish species (United States Environmental Protection Agency, 2022). Recent publications also revealed that the presence of plastic waste could also change the climate by disrupting carbon sequestration processes and altering the reflectivity of ice and terrestrial surfaces, thereby exacerbating global warming and climate instability (Sunil et al., 2024;Villarrubia-Gómez et al., 2024). On the other hand, climate change (e.g., higher temperature, stronger UV radiation, etc.) can further increase the degradation of plastic waste, releasing uncountable microplastics (MPs; <5 mm) or nanoplastics (NPs; <1 μm) into the environment (Wei et al., 2024). ...

Plastics pollution exacerbates the impacts of all planetary boundaries
  • Citing Article
  • November 2024

One Earth

... They stressed that this approach denotes the risk of positioning the CE primarily as a tool to improve economic competitiveness rather than as a means to promote sustainable development. Canada, Australia, Indonesia, the United Kingdom and the African Group of States have emphasized that government strategies on plastics should align with existing multilateral environmental agreements, including the Basel, Stockholm, Rotterdam, and Minamata Conventions, as well as the Rio Declaration [46,47]. Addressing the plastics crisis requires coordinated national, regional, and global efforts involving industry, civil society, academia, and governments [48]. ...

The Zero Draft Plastics Treaty: Gaps and challenges

... The particles identified in this study were mainly blue and black fibers (32.1% and 18.7%, respectively), which are the predominant type of particles ingested by other marine chondrichthyans (Gong et al., 2024). Different polymers have different leaching properties (Lithner et al., 2011) and different capacities to accumulate toxic chemicals (Bond et al., 2018), and microfibers are the particles of most toxicological concern (Brander et al., 2024). While the impacts of microplastic ingestion are difficult to assess and generally not lethal (Bucci et al., 2020;Galloway et al., 2017), especially in largebodied megafauna (Roman et al., 2020), chronic exposure raises concerns for feeding, behavior, and reproductive issues (Galloway et al., 2017). ...

The time for ambitious action is now: Science-based recommendations for plastic chemicals to inform an effective global plastic treaty

The Science of The Total Environment

... While the opportunity to potentially reframe our societal relationship with plastic is the source of significant optimism, the negotiating process has not been without controversy -notably the actual or perceived marginalisation of indigenous communities and scientists in the process to date [40]. Furthermore, negotiations thus far have proven challenging due to the conflicting interests posed by the need to reduce the input and impacts of plastic waste versus the profits of petrochemical companies and the countries that produce these resources [8]. ...

Informing the Plastic Treaty negotiations on science - experiences from the Scientists’ Coalition for an Effective Plastic Treaty

Microplastics and Nanoplastics

... Similarly, another study by Banaei et al. [37] on common carp Cyprinus carpio demonstrated that microplastic exposure induced oxidative stress, leading to increased activities of antioxidant enzymes, including SOD, in various tissues. A study conducted in gilthead seabream Sparus aurata, the subchronic exposure to polystyrene microplastics for 21 days caused oxidative imbalance by altering the antioxidant defense system [38]. ...

Subchronic oral exposure to polystyrene microplastics affects hepatic lipid metabolism, inflammation, and oxidative balance in gilthead seabream (Sparus aurata)
  • Citing Article
  • May 2024

Ecotoxicology and Environmental Safety

... The results showed a similar trend to those observed in the water samples, with HDPE ponds exhibiting higher microplastic concentrations in shrimp tissues compared to concrete ponds. The most common types of microplastics found in shrimp tissues were fragments and fibers, which were predominantly polypropylene and polyethylene, consistent with previous studies on microplastic contamination in aquatic organisms (Kardgar et al. 2024;Contino et al. 2023). Table 3 shows the concentrations of microplastics found in shrimp tissues. ...

Microplastics in aquaculture - Potential impacts on inflammatory processes in Nile tilapia
  • Citing Article
  • April 2024

Heliyon

... Achieving this goal requires time, incremental actions, and careful consideration of economic impacts, yet it has faced strong resistance in countries like the United States, India, and Bahrain [46]. Experts recommend a legally binding global reduction target for problematic plastics, which would increase their value as production decreases, helping to offset economic consequences [52]. At the operational level, establishing favorable economic conditions to mitigate the high investment costs of producing new (bio)polymers on an industrial scale has also been identified as a priority [19]. ...

Primary Plastic Polymers: urgently needed upstream reduction

... Further, a collaborative approach is recommended, as well as the use of standardized methods, such as LCA, and integration of Indigenous knowledge and other cultural and socioeconomic factors in research 45 . Although the INC Chair's Text offers hope for a meaningful global agreement, researchers have flagged the risk of vested interests steering the INC process and are thus calling for the establishment of a science body to guide the process and ensure that unbiased decisions are made 105 . The recent INC-5 session revealed industry's strong interests in influencing the outcomes of the INC process, as fossil fuel and chemical industry lobbyists outnumbered the representatives from the European Union delegations combined, were threefold compared with the number of independent scientists representing the Scientists' Coalition for an Effective Plastics Treaty, and nine times greater than the Indigenous Peoples Caucus 106 . ...

Global plastics treaty needs trusted science
  • Citing Article
  • April 2024

Science