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acid, sleet, toxic fumes, reduce,air polluters, emit

The main ???
are cars, buses, and planes which ???
smoke and gases into the air.
??? mix up in the atmosphere making it ???
and later land on grass, trees, and buildings in the form of rain, fog, or ???
. We should ???
air pollution that causes acid rains.

ksenia32    1   09.04.2020 15:16    18