As marine plastic pollution threatens ecosystems, economies, and human health, scaling marine biotechnology within a life-cycle-based, globally coordinated policy framework offers the most viable path forward
Marine plastic pollution has become one of the major environmental and policy challenges of this century. Rapid industrial growth, coupled with growing consumption of single-use plastics and inefficient waste management, has contributed to a significant rise in marine plastic pollution. The United Nations Environment Programme (UNEP) reports that more than 11 million metric tonnes of plastic enter the marine environment annually, with a cumulative plastic stock of 75-199 million tonnes. Without appropriate interventions, plastic pollution of the marine environment could triple by 2040.
In addition to environmental consequences, the crisis results in both economic and social burdens. Marine plastics contribute to approximately 85 percent of total marine litter. The economic burden impacting tourism, fisheries and coastal livelihoods was estimated at US$6-19 billion per year. As this remains a persistent challenge, a life-cycle-based policy framework integrating marine biotechnology approaches is required for upstream waste reduction, circularity, and innovation.
Plastics account for at least 85 percent of the ocean debris. Due to their durability (often over centuries), they accumulate in the ocean, rather than degrading. Over time, large plastic debris undergoes chemical, physical, and biological processes, breaking down into microplastics (<5 mm) and nanoplastics. Microplastic and nanoplastic particles are widespread, from coastal zones to deep-sea sediments and even into polar regions. Current estimates state that approximately 170 trillion plastic particles are present in the oceans, forming a “plastic smog”.
The ocean, beyond being a global sink for plastic waste, offers solutions to sustainable plastic waste management.
Microplastics also pose a significant risk from a policy and health perspective because marine organisms consume them at various trophic levels and accumulate toxic pollutants such as heavy metals, and enter human food chains through seafood. In addition, global plastic production continues to increase, reaching approximately 450 million tonnes annually, while recycling rates remain below 10 percent. These trends highlight that marine plastic pollution is more than a waste management challenge; it signals a deeper failure of global material governance.
While traditional measures to address ocean plastic pollution, such as waste management, single-use plastic ban and promoting recycling, are essential, they remain inadequate. The United Nations Environment Programme (UNEP) emphasises the need for long-term, comprehensive intervention, particularly given the long lifespan and resulting accumulation of plastic in marine environments. Removing ocean plastics using mechanical methods is expensive and largely ineffective in tackling microplastic pollution. The Ocean Cleanup initiative has demonstrated progress in extracting microplastics from ocean gyres, even though microplastic pollution and scalability could remain significant challenges. Coastal cleanup initiatives in India, such as the Swacch Sagar Surakshit Sagar initiative, have improved awareness and coastal cleanliness; however, they remain limited in addressing plastic leakage upstream.
Marine plastic pollution is more than a waste management problem. It reflects a deeper, structural issue of material governance globally.
Biodegradable plastics do not offer a comprehensive solution, as they require specific conditions for degradation and persist in the marine ecosystem for long durations. These limitations have led to a rising interest in marine biotechnology as a complementary and transformative approach. Similarly, many initiatives for coastal cleanup largely remain symbolic, failing to address the root cause or generate public awareness. At the same time, local communities with traditional knowledge of sustainability are often sidelined in policy and decision-making processes. For instance, mangrove-dependent communities are rarely included in coastal development conversions and community-led beach management is often sidelined by top-down cleanup initiatives.
Marine biotechnology utilises biological systems such as enzymes, microorganisms and algae to mitigate environmental challenges. It provides novel pathways for the biodegradation and recycling of plastic and for its integration into circular economy frameworks. Scientific research shows that certain microorganisms can degrade plastic, with more than 30,000 plastic-degrading enzymes identified in marine and terrestrial environments. This suggests an important role of marine biotechnology in policy frameworks. However, the rate of biodegradation is a gradual process, as plastics are relatively new to natural systems in evolutionary terms, and plastic-degrading enzymes are still not widespread.
Marine plastic debris serves as a substrate that supports microbial communities, leading to the formation of biofilms. These biofilms enable the degradation of plastic particles and present opportunities for engineering to enhance their degradation rates. Further research and intervention on these microbial communities could significantly enhance their overall biodegradation efficiency. Globally, companies such as Carbios are advancing enzymatic recycling methods to convert plastic into reusable materials on an industrial scale. In India, research institutions such as the Council of Scientific and Industrial Research (CSIR) are working on microbial approaches for plastic degradation.
Marine biotechnology offers sustainable solutions for both marine plastic waste management and economic development through value addition.
Advancements in synthetic biology enable the development of microorganisms with improved plastic-degrading functions and the conversion of plastic into useful value-added products, such as chemicals or biofuels. In addition, marine biotechnology innovations enable the production of bio-based alternatives to plastics, such as seaweed-derived biodegradable polymers. These materials can help reduce plastic pollution, in addition to contributing to the growth of a sustainable blue economy. In India, companies such as Sea6Energy are working on marine-derived biomaterials which can replace conventional plastic to support the transition to a more sustainable and circular blue economy.
Despite its promise, scaling up remains challenging due to barriers to large-scale deployment, including slow degradation rates, ecological concerns about releasing engineered microorganisms into the natural marine environment, and high costs and regulatory ambiguity. Furthermore, biotechnology alone is insufficient to address the underlying issues of excess plastic production and combustion.
To address ocean pollution effectively using marine biotechnology approaches, comprehensive, integrated, and future-oriented policy interventions are necessary.
Financial support for blue economy startups: Dedicated funding mechanisms, such as grants and public-private partnerships to scale up marine biotechnology interventions, and increased investments in emerging blue economy startups are essential. Globally, programmes such as Horizon Europe support bio-based and circular economy innovations, including alternative technologies for plastic degradation. In India, initiatives such as Startup India promote blue biotechnology ventures through targeted support such as incubation support and financial incentives.
Commercial deployment of marine biotechnology-based solutions requires an approach integrating innovation, environmental sustainability, and policy frameworks.
Strong regulatory and monitoring frameworks: Establishing clear regulatory guidelines is essential for the safe use and deployment of engineered plastic-degrading microbes. In addition, strong protocols for environmental risk assessments and intellectual property and technology transfer mechanisms are necessary. Marine biotechnology could be integrated within wider bioeconomy and ocean governance policies in India. At the global level, the European Chemical Agency is incorporating microplastics into the existing REACH regulation framework. In an Indian context, marine biotechnology initiatives for managing plastic pollution can be integrated into national ocean and bioeconomy policies under the Ministry of Environment, Forest, and Climate Change (MEFCC). The updated Extended Producer Responsibility (EPR) framework focuses on improving traceability, digital tracking of marine plastic waste streams, and stringent compliance targets.
Circular bioeconomy: Policy frameworks should encourage the conversion of plastic waste into high-value products, integrating marine biotechnology with recycling systems. At the global level, initiatives such as Parley for the Oceans focus on transforming marine plastic waste into novel materials. Oceanworks supports the collection and recycling of ocean plastic waste for use in manufacturing. Another notable example is 4ocean, which integrates ocean plastic removal with the production of value-added, novel products. In India, the Blue Flag Programme advances sustainable plastic waste management and infrastructure. The Ministry of Earth Sciences supports research on marine and microplastic pollution and supports informed policy responses. Focused public awareness initiatives and Corporate Social Responsibility (CSR) investments in marine plastic management can help scale sustainable solutions.
Strong data and monitoring systems: Robust data systems are necessary to monitor the flow of plastic pollution, identify hotspots, assess the effectiveness of marine biotechnology solutions, and enable evidence-based policymaking. For instance, the Global Partnership on Marine Litter facilitates the sharing and monitoring of data on marine litter. The Central Pollution Control Board in India has incorporated monitoring and data collection on marine plastic and microplastic leakage.
International collaboration: International cooperation and multilateral agreements, such as global plastic treaties, should include marine biotechnology-based solutions, improving cross-country collaborations and knowledge sharing and encouraging South-South cooperation to scale innovative solutions. The United Nations is negotiating the Global Plastics Treaty to introduce binding international commitments regarding plastic waste management. India’s active involvement in regional initiatives such as the Indian Ocean Rim Association can help in the advancement of South-South partnerships in marine biotechnology innovations for plastic management.
It is essential to include local communities and their traditional knowledge of sustainable coast management in decision-making.
Local community and MSME participation: The engagement of local communities and medium and small coastal industries are essential for the scale-up and commercial deployment of marine biotechnology innovations. They should be integrated alongside waste management, processing and promoting community awareness. For instance, in Indonesia, community-based recycling initiatives have demonstrated effective plastic waste management at the local level using decentralised systems. Coastal livelihood programmes in India under the Pradhan Mantri Matsya Sampada Yojana can be expanded to incorporate plastic waste management and circular economy-based business models.
Addressing marine plastic pollution requires transitioning from fragmented approaches towards a more coordinated, marine biotechnology and innovation-driven, circular economy-based policy approach. Scaling up of marine biotechnology-based interventions while ensuring environmental sustainability can enable innovative pathways for the advancement of the blue economy. However, achieving its full potential requires integrated policy support, targeted financial investments, and global collaboration. Going ahead, integrating these approaches into the national and international policy frameworks will be crucial for addressing marine plastic pollution and building resilient and sustainable marine ecosystems.
Poornima V B is a Research Assistant at the Observer Research Foundation.
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Dr Poornima V B is an Associate Fellow at ORF. Her work focuses on blue economy, marine circularity, and sustainable resource policy. She has contributed ...
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