Question

What is air pollution?
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Answer 1

Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. There are many different types of air pollutants, such as gases, particulates, and biological molecules

Answer 2

Answer:

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