Air pollution

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air pollution

The presence of substances in the atmosphere, particularly those that do not occur naturally.

These substances are generally contaminants that substantially alter or degrade the quality of the atmosphere. The term is often used to identify undesirable substances produced by human activity, that is, anthropogenic air pollution. Air pollution usually designates the collection of substances that adversely affects human health, animals, and plants; deteriorates structures; interferes with commerce; or interferes with the enjoyment of life.
Compare airborne particulates, designated pollutant, particulates, criteria pollutants.

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