Acid rain results from the release of pollutants, primarily nitrogen oxides (NOx) and sulfur dioxide (SO2), into the atmosphere. These compounds can originate from industrial activities, vehicle emissions, and the burning of fossil fuels. When they react with water vapor, oxygen, and other trace chemicals in the atmosphere, they form sulfuric and nitric acids, which descend to the ground as acid rain, causing detrimental effects on ecosystems, soil, and water bodies, and highlighting the critical intersection of industrial pollution and environmental sustainability, central themes in UPSC GS Paper I.