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Plastic litter in life cycle assessment: Advances of the marine impacts in life cycle assessment international taskforce and application to case studies
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This review examined advances in incorporating marine plastic litter impacts into life cycle assessment, addressing the long-standing gap in LCA methodology for accounting for plastic pollution as an environmental impact category. Recent progress by the MarILCA research group was highlighted as bringing LCA closer to properly reflecting biodiversity and ecosystem impacts from plastic waste.
Even though marine litter, especially plastic, is viewed as an important threat to biodiversity, life cycle assessment (LCA) was late to implement any indicators allowing the consideration of this important hazard. Without these emissions included, LCA is not adequately supporting decision making with respect to plastic use and potential alternatives, and what seems like environmental solutions to the plastic problem may in fact generate more impacts on the environment. After the publication of a first framework detailing the assessment of marine plastic litter in life cycle impact assessment, the Marine Impacts in Life Cycle Assessment (MarILCA) working group has made concrete advancements in various stages of the impact modelling. Characterization factors, translating emissions flows into potential environmental impacts, were proposed in 2023 and now updated, to characterize the ecosystem damages caused by physical effects of microplastic emissions of 16 polymers, 5 sizes and 3 shapes, and applied to different case studies. Pathways associated to human health impacts from microplastics emissions are being quantified and while results are available for some polymers, challenges remain for others. This research proposes an overview of the advancements made on the quantification of the different building blocks of the impact pathways leading to damages on biodiversity and human health associated with plastic emissions in the environment, the challenges that remain, and how the results can affect decision making of plastic-based products and their alternatives when included in life cycle assessments of diverse applications including packaging, textiles, fisheries and agricultural uses. Also see: https://micro2024.sciencesconf.org/559631/document
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Researchers reviewed advances in incorporating marine plastic litter impacts into life cycle assessment, focusing on recently developed indicators for biodiversity and ecosystem quality. The new indicators allow LCA practitioners to account for plastic pollution when comparing product systems and informing design choices.
Integrating impacts of microplastics in Life Cycle Assessment modelling: the work of the MarILCA group
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This paper describes the work of the MarILCA group to incorporate microplastic impacts into Life Cycle Assessment (LCA) modeling, which evaluates the environmental footprint of products and processes. Currently, most LCA studies ignore plastic leakage to the environment, creating a blind spot for the real-world impacts of plastic production. Integrating microplastic impacts into LCA could help guide more sustainable material choices and policy decisions.
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Researchers reviewed how plastic pollution is — and is not — accounted for in life cycle assessments (LCAs), which are tools used to measure a product's full environmental footprint. They found that while ocean plastic impacts have been partially modeled, freshwater and terrestrial plastic pollution, including microplastics, are still missing from standard environmental impact calculations, leaving a major blind spot in sustainability analysis.
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