what is acid rain ? please say
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Acid rain is when the rain's ph value lessens from 7.0 to 5.0
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Acid rain, also called acid precipitation or acid deposition, precipitation possessing a pH of about 5.2 or below primarily produced from the emission of sulfur dioxide (SO2) and nitrogen oxides (NOx; the combination of NO and NO2) from human activities, mostly the combustion of fossil fuels.
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