Acid rain is the indirect result of air pollutants and can cause harm to wildlife, statues, and the environment (such as the forest and rivers).
Acid rain formation starts with the emission of pollutants in the air that contain oxides such as sulfure oxides and nitrogen oxides (which dissolve very easily into water). Human activities are the main cause of the release of such compounds. Factories release most of the sulfur oxides. The burning of fossil fuels from cars is the cause of most of the nitrogen oxides.
Once emitted, the oxides rise into the atmosphere, where they combine with water, oxygen and chemicals. When these compounds dissolve in the precipitation, they can be carried by winds. Thus, the acid rain can be formed in one location and have an effect on another regions hundreds of miles away.