When is air said to be polluted?
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when the no. of impurities in the air are increased air is said to be polluted.
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When the air is not pure as we need to breath,then the air is said to be polluted
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Answered by
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air said to be poluted when it contains undesirable harmful substance. like Co, co2, so2, no2, CFC etc.
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okey
Air pollution occurs when harmful or excessive quantities of substances including gases, particles and biomolecules are introduced into earth's atmosphere
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