STEM与日常科技·英语30篇（8）
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Concrete That Cleans Air
能净化空气的混凝土
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Special concrete has titanium dioxide inside.特种混凝土中含有二氧化钛。
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Sunlight activates this chemical to break down air pollution.阳光激活这种化学物质，分解空气污染物。
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It turns car exhaust gases into harmless salts.它将汽车尾气转化为无害盐类。
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Buildings and sidewalks made with it stay cleaner.用其建造的建筑和人行道更耐脏。
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Rain washes away the harmless byproducts naturally.雨水能自然冲走这些无害副产物。
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This tech helps cities with heavy traffic.这项技术有助于缓解交通拥堵城市的空气污染。
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It does not replace trees—but works alongside them.它不能替代树木，但可与树木协同作用。
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Cleaner air means healthier lungs and clearer skies.空气更清洁意味着肺部更健康、天空更澄澈。