Acid rain is caused when nitrogen oxides, SO2 and particulate matter in the atmosphere react with H2O to produce acids. Acid rain is harmful to the environment. It affects life in water and on land. The fish cannot survive in acidic water below pH 4.5. It can also damage trees in the forests.
In humans, it can cause asthma and premature deaths when food, water or air which is in contact with acid deposits is consumed. The soil characteristics are also greatly affected. This has an effect on the crops and agricultural productivity.
The buildings, monuments are also damaged by acid rain. It also increases the corrosion rate of metals.