Acid rains are caused by excessive atmospheric pollution due to
A
SO2
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B
N2O
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C
CO2
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D
NH3
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Solution
The correct option is A
SO2
Acid rain is generally caused due to an excess of sulphur dioxide and nitrogen oxides (such as nitric oxide and nitrogen dioxide) in the atmosphere. N2O or nitrous oxide is not involved in acid rain; it adds to the earth's natural greenhouse effect. However, if present in excess amounts in the atmosphere, it can result in global warming.