Define air pollution
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The contamination of air by undesired substances or pollutants like methane,SO2 etc is called as air pollution.
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This may help you...
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the presence or in introduction into the air of
substances which has harmful or poisonous effect is known as air pollution.
Hope it is a correct answer.........
substances which has harmful or poisonous effect is known as air pollution.
Hope it is a correct answer.........
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