How is acid rain caused? What are its effects?

Pollutants like sulphur dioxide and nitrogen oxide mix with the moisture in the air to become sulphuric acid and nitric acid. Rain, snow and other precipitation containing sulphuric acid and nitric acid fall to the earth causing acid rain.

Acid rain causes extensive damage to forests, fish, animals and human beings. It also damages the statues and stonework of buildings. It may cause crop destruction and respiratory problems in children.