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Plastic Pollution: Challenges and Strategies
Summary
Less than 10% of plastics are recycled annually, with the vast majority entering natural environments where nano- and microplastics accumulate across biogeochemical cycles, posing documented threats to organismal, ecosystem, and human health. The review focuses on agricultural plastics as a critical case study for why efforts to develop truly biodegradable and biobased plastics have largely failed and how they must improve to support a circular economy.
Abstract More sustainable plastics can play a major role in the biocircular economy. Of the trillions of pounds produced each year, less than 10% are recycled. Thus, the vast majority of waste plastic ends up in the natural environment where it participates in all major biogeochemical cycles, often taking centuries to chemically decompose. Importantly, there is a rapidly emerging literature documenting the massive environmental impacts of these plastics, especially in the form of nano- and microplastics, on organismal, ecosystemic, and human health. Here, we focus on one key aspect of this plastic industry: agricultural plastics. We examine efforts to create more biodegradable and biobased plastics, how these efforts have failed, and how they can be improved to better fit the biocircular economy.