Acid rain: A. happens when sulfuric acid mixes with rain.

B. is a form of air pollution.

C. is caused by the sulfur released into the air by burnt coal.

D. All of the above.

Explanation:

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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