Acid Rain Causes

Acid rain is primarily caused by sulfur dioxide (SO₂) and nitrogen oxides (particularly nitrous oxide/NO₂) from industrial emissions and vehicle exhausts. These gases dissolve in atmospheric moisture to form sulfuric and nitric acids, which fall as acid rain. While CO₂ contributes to global warming and can form carbonic acid, it is not the primary cause of acid rain. Options (a), (b), and (c) do not correctly identify the main acid-forming pollutants. Option (d) is correct.