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The Impacts of Single-use Plastics - A Life Cycle Assessment
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This life cycle assessment study compared the global warming potential of plastic and compostable single-use eating and drinking utensils, finding that product weight and material composition were the primary drivers of climate impact across the full lifecycle. Researchers found that compostable alternatives did not consistently have lower climate impacts than conventional plastics. The study highlights trade-offs that complicate simple single-use plastic substitution policies.
The objective of this study is to compare some examples of plastic and compostable single use eating and drinking utensils in terms of their environmental degradation. We use Life Cycle Assessment (LCA) to quantitatively compare these products’ impacts on the environment throughout their life cycle. Specifically, we quantify and compare the global warming potential (GWP) of each single use eating and drinking utensil/container. The results of this study were that product weight, and that the material products are made from have a significant impact on GWP. This study outlined similar studies that have been done on this topic to better understand the environmental effects of single-use products, and efforts to minimize their impacts as use continues to grow.
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Researchers conducted a life cycle assessment comparing banned single-use plastic products in Canada with their alternatives, including paper, cotton, and bioplastic options. They found that while banning plastics reduces plastic pollution, some alternatives have higher carbon footprints or water usage. The study suggests that effective policy needs to consider the full environmental impact of replacement materials, not just plastic waste reduction.
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Researchers compared the lifecycle greenhouse gas emissions of single-use plastic cups against reusable alternatives for beverages, finding that reusable cups have lower per-use emissions after a modest number of wash cycles, but that the break-even point depends heavily on washing method and use frequency.
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Researchers systematically reviewed 53 life cycle assessment studies comparing plastic packaging to alternatives like glass, paper, and metal, finding that conventional plastics frequently have lower overall environmental impact than perceived-sustainable substitutes when full production and transport emissions are accounted for.
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