What is a significant consequence of sulfur dioxide emissions?

Sulfur dioxide emissions are primarily associated with the formation of acid rain, which occurs when sulfur dioxide reacts with water vapor in the atmosphere to produce sulfuric acid. This acid rain can significantly damage ecosystems by altering soil chemistry, harming plant life, and affecting aquatic environments through increased acidity in water bodies. Additionally, acid rain can erode buildings, monuments, and other structures, particularly those made of limestone or marble, which are sensitive to acidic conditions. This impact on both natural and built environments illustrates the widespread consequences of sulfur dioxide emissions, highlighting why the correct choice focuses on the formation of acid rain that affects various ecological and structural aspects.