Pollution is a serious problem on our Earth today. People
and companies pollute the water by throwing trash into it. Chemicals that
kill plants and fish are also dumped into the water. Air pollution is another
type of pollution that we should worry about. Some of the air we breathe
is not clean. Factories and power stations pollute the air with smoke and
poisonous gases. Cars also make exhaust fumes that pollute the air. When
these gases mix with the water in the air, they produce acid rain. This
rain is not good for the plants on earth. The more acid there is in the
rain, the faster it will kill the plants.
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