Burning fossil fuels for energy is a major cause of acid rain. When fossil fuels such as coal, oil, and natural gas are burned, they release sulfur dioxide and nitrogen oxides into the atmosphere. These gases react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid, which then fall to the earth as acid rain. This acidic precipitation can have harmful effects on the environment, including damaging forests, lakes, and buildings, and also posing risks to human health.