Bioluminescence is a predominant phenomenon in marine environments, the production of light by living organisms through enzyme-mediated chemical reactions involving luciferin, the light-emitting substrate and luciferase, the enzyme that catalyses its oxidation. In the deep sea, bioluminescence is not merely a visual trait but a critical ecological function supporting prey capture, mate recognition, communication and other species interactions. Recent evidence indicates that plastic exposure can alter bioluminescent responses through ingestion, tissue stress, oxidative damage and interference with chemical signalling pathways. This is of growing concern because plastic debris and microplastics are increasingly detected from surface waters to abyssal environments, making them bioavailable to deep-sea organisms. Since many deep-sea organisms depend on bioluminescence for survival and reproduction, any impairment of light production mechanisms can influence not only individual fitness but also prey–predator interactions, trophic transfer and ecosystem functioning. This letter highlights plastic pollution as an emerging threat to deep-sea bioluminescence and calls for long-term monitoring and policy attention to protect biological light-mediated ecological processes in the deep ocean.

Microplastic (MP) pollution in terrestrial ecosystems is attracting global attention. The transfer of MPs in terrestrial food chains remains poorly understood, particularly in poultry systems. This study investigates polystyrene (PS) MP transfer and surface weathering characteristics in an “earthworm-chicken” food chain by feeding chickens earthworms that had been previously exposed to PS MPs and by oral gavage. The results showed that MP concentrations decreased from soil (10.06 ± 0.03 mg/g) to earthworm casts (6.39 ± 1.05 mg/g) to chicken faeces (3.76 ± 0.39 mg/g), and the transfer process of MPs in the “earthworm-chicken” food chains is characterized by continuous fragmentation. MPs were distributed throughout different parts of the chickens’ digestive tract after 3 h oral gavage and were only detected in the faeces after 24 h. Scanning electron microscopy and Fourier transform infrared spectroscopy revealed that MPs underwent varying degrees of weathering in the earthworm casts, chicken faeces and gastrointestinal tract, exhibiting surface holes and cracks. Compared with pristine MPs, the significantly higher carbonyl index of MPs in the gizzard demonstrates the key role of the gizzard in MP fragmentation. This study contributes to understanding the trophic transfer and fragmentation processes of MPs in chickens, and provides a basis for future research on the environmental processes of MPs in terrestrial food chains.

Marine litter, predominantly plastic, is a global environmental threat, which management is hindered by the absence of large-scale monitoring tools. This study extends a framework to detect Floating Marine Macro-Litter (FMML) in the complex waters of the Pearl River Estuary (PRE) and Hong Kong, using the MARIne Debris Archive benchmark dataset and Sentinel-2 imagery. A comparative analysis showed that a Random Forest (RF) classifier – leveraging spectral indices and textural features – significantly outperformed a U-Net model, achieving higher macro-F1 scores and precision. Applying the RF classifier to the PRE from 2017 to 2024, results revealed distinct spatial–temporal patterns, with FMML peaks in March and September linked to seasonal hydrology and complex circulation. Detection results deviated from summer clean-up ground truth data, suggesting that high hydrodynamic energy processes may cause rapid transport, submergence, or stranding, reducing satellite visibility. Although the model faced generalization challenges, it demonstrated strength in identifying large accumulations related to circulation and regional debris traits. This research underscores the potential of satellite monitoring while emphasizing the need for regionally calibrated models that integrate hydrodynamic data to align remote sensing with on-ground realities, ultimately supporting mitigation in dynamic coastal environments.

Microplastics are widely discussed as a pervasive environmental issue, yet decisive action and turning them into a governable “policy object” has proven to be slow and challenging. This paper investigates the shifting and heterogeneous problem framings of microplastic pollution and the regulatory complexities that emerge from them. Drawing on research from science and technology studies, we analyze how microplastics remained “hidden in plain sight” for decades, obscured by limited scientific standardization, competing problematizations, debates over scientific evidence, widespread cultural imaginaries and economic interests. The research reveals that the path from scientific knowledge to policy action is not linear but a process of co-production, where public concern, scientific capabilities and political agendas continuously reshape one another. We trace the evolution of the issue – from marine pollution to other media, human health and now nanoplastics – highlighting how each shift opens up new questions posing new (regulatory) challenges. The findings demonstrate that effective environmental governance requires more than data; it demands a critical understanding of the complex innovation pathways that produce such residues. We conclude that durable solutions require extended infrastructures of responsibility and care and the development of adaptive institutional frameworks capable of navigating scientific uncertainty and contested values.

With plastic pollution continuing to rise, there has been increasing interest in bioplastics as potential solution. While protein and starch-based bioplastics offer biodegradable properties, many still rely on non-sustainable starch sources. For these materials to be effective, they need to be both biodegradable and sustainably sourced. Just as importantly, the public, as the end users, need to find them appealing and understand what makes them different. This study evaluates perception of bioplastics and the possible applications of the starch-protein blend biopolymers (SPBBs) made from: Potato, Tapioca, Sago and Swamp Taro. Through public survey and focus group, the study found that age and education influenced people’s understanding of terms like “biodegradable” and “biobased.” While most were familiar with biodegradability, fewer understood biobased, though many were open to paying up to 5% more for sustainable alternatives. The results also showed that 74% of people use plastic alternatives, and 80% identified packaging, especially food packaging, as major source of pollution. In the focus group, participants prioritised sustainability, cost, clarity and colour. They also suggested using media campaigns, influencers and clearer labelling to boost public awareness. Future research should investigate public understanding of bioplastics and their cost implications to encourage shift towards more sustainable, environmentally friendly choices.

Ocean plastic pollution is a global issue, but many small island states lack relevant research studies and data. Microplastics are a major concern due to their persistence, entry into food chains and potential to transfer pollutants. Fish gastrointestinal tracts are easy to sample and provide a useful indicator of pollution levels. In 2024, we sampled 201 reef fish spanning 44 species from Funafuti Atoll, Tuvalu, to provide the first baseline microplastic data from this island nation. In total, 75 individuals (37.3%) contained microplastics. The mean occurrence was 0.72 ± 1.16 (mean ± SD) particles per fish, with a maximum of 5 particles per fish found in individuals of four species: Aphareus rutilans, Mulloidichthys flavolineatus, Mulloidichthys vanicolensis and Sargocentron spiniferum. When focusing analyses on seven species with 10 or more individual samples, generalized linear models found no significant differences among species, but revealed fish had significantly more microplastics close to the most populous islet Fongafale (0.95 ± 1.26 particles per individual), compared to rural islets Papaelise and Funafala (0.28 ± 0.77 particles per individual). Fibers were the most common microplastic, and polypropylene was the dominant polymer. This study confirms microplastic presence within the gastrointestinal tracts of key food fish from Funafuti lagoon, emphasizing the need for further research.

The inability of the Intergovernmental Negotiating Committee (INC) to reach agreement on a legally binding Global Plastics Treaty at INC-5.2 in August 2025 reflects deep geopolitical and economic divisions that limit international environmental governance. While most countries in the High-Ambition Coalition supported upstream interventions, including capping plastic production and phasing out hazardous chemical additives, oil-producing states (members of the Like-Minded group) pushed to limit the treaty to waste management and recycling (downstream measures). This deadlock carries profound implications: escalating plastic pollution and greenhouse gas emissions, impacting the trust in multilateral institutions that rely on consensus and the growing influence of petrochemical lobbies. Moving forward may require reforming negotiation procedures that do not rely on consensus, making evidence-based policymaking a priority, supporting equity and just transition principles and leveraging regional leadership and civil society mobilisation. Despite the current stalemate, the urgency of the plastics crisis underscores the necessity of renewed global commitment to an ambitious and equitable Global Plastics Treaty.

Plastic pollution, once seen mainly as an ocean issue, is now understood as a threat across the entire life cycle of plastics – impacting climate, biodiversity and human health. Scientific evidence shows that every stage, from fossil fuel extraction to use to waste (mis)management, harms the environment and disproportionately affects vulnerable populations, violating basic human rights, including the rights to life, health, food, water, information and a clean, healthy and sustainable environment. The proposed Global Plastics Treaty should explicitly integrate human rights to strengthen its effectiveness. Doing so would align it with existing international agreements, such as the International Covenant on Civil and Political Rights and the International Covenant on Economic, Social and Cultural Rights, the Aarhus Convention and the Escazú Agreement, reinforcing obligations to protect people from pollution. Hazardous chemicals in plastics, often hidden or underreported by industry, pose direct and indirect threats to human health and well-being. Recognizing the right to science and access to information is key for public participation and accountability. Many countries, including regional blocs and alliances, support a rights-based approach for the Global Plastics Treaty. Human rights can be embedded in all parts of the treaty, from its preamble to implementation mechanisms. This integration not only enhances environmental protection but also ensures social justice. Without such an approach, governments risk future legal challenges for failing to protect citizens from the harms of plastic pollution.