STEM与日常科技·英语30篇（5）
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Bio-Derived Plastics That Compost in Your Backyard
源自生物的塑料，可在后院堆肥
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Most ‘bioplastics’ break down only in industrial facilities at 60°C—leaving backyard compost bins unchanged.
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New polymers made from fermented corn starch and plant oils now decompose fully at ambient temperatures.
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Enzymes in soil microbes recognize their chemical structure and dismantle them into water, CO₂, and humus.
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Certified home-compostable bags and food containers vanish in 45–90 days under typical garden conditions.
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They leave no microplastics, toxins, or residue—unlike conventional plastics that persist for centuries.
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Farmers use these films to mulch crops, then till them directly into soil as organic fertilizer.
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Retailers report 30% fewer customer complaints after switching checkout bags to this type.
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Production uses 40% less fossil fuel than petroleum-based plastics—and captures CO₂ during plant growth.
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Standards like TÜV Austria OK Compost HOME ensure authenticity, preventing greenwashing claims.
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This is circular design in action: grown from plants, used once, returned safely to earth.