Verified Answer :

macboudr82

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
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Sulfur Dioxide is the gas that when mixed with moisture in the atmosphere, and it can form acid rain.