what is air pollution
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The presence in or introduction into the air of a substance which has harmful or poisonous effects !
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Explanation:
Air pollution occurs when harmful or excessive quantities of substances including the gases, particles, and biological molecules are introduced into Earth's atmosphere. It may cause diseases, allergies and even death to humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment. Both human activity and natural processes can generate air pollution.
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