Question

define air pollution
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Answer 1

Answer:

the presence in or introduction into the air of a substance which has harmful or poisonous effects.

Explanation:

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Answer 2

Answer:

Air pollution - Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog. Some air pollutants are poisonous.