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purify the air

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1
What happens if you cut down all of a city's trees? - Stefan Al
Their porous leaves purify the air by trapping carbon and other pollutants,
environment
очищать воздух
Удалять из воздуха загрязняющие или вредные вещества.
What happens if you cut down all of a city's trees? - Stefan Al
B2
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