Acid rain is a rain that is unusually acidic due to the presence of acids such as sulphuric acid (H2SO4) and nitric acid (HNO3). Rain is acidified by oxides of sulphur and nitrogen. Acid rain usually has a pH of less than 5.6. It is formed when pollutants such as oxides of sulphur and nitrogen (like sulphur dioxide, nitric oxide etc), contained in power plant smoke, factory smoke, and car exhaust, react with the moisture in the atmosphere to form sulphuric acid and nitric acid.
It can have harmful effects on plants, aquatic animals, and infrastructure. Following are the harmful effects of acid rain
Dissolves nutrients essential for plant growth
Causes respiratory ailments in humans
Affects aquatic ecosystem
Corrodes water pipes resulting in leaching of heavy metals in drinking water
Damage buildings made up of stone and metal