科学素养与生活应用·英语30篇（3）
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How Compost Turns Waste into Soil
堆肥如何将废物变成土壤
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Compost is made from food scraps and yard waste.堆肥由厨余垃圾和庭院废弃物制成。
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Tiny organisms break down the material slowly.微小生物缓慢分解这些物质。
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Heat, air, and water help the process work well.热量、空气和水分有助于堆肥顺利进行。
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After weeks or months, it becomes dark, rich soil.几周或几个月后，它会变成深色、肥沃的土壤。
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This soil helps plants grow better and stronger.这种土壤能帮助植物长得更好、更茁壮。
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Composting keeps waste out of landfills.堆肥可减少垃圾填埋量。
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It reduces bad smells and methane gas.它还能减少异味和甲烷气体。
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Home compost bins are easy and useful tools.家用堆肥桶简单又实用。