Question

How air becomes polluted?

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Answer 1

Answer:

Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires. The solid and liquid particles suspended in our air are called aerosols.

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Explanation:

Answer 2

Answer:

by waste materials and by harmful chemicals in air and also by smoking