The term acid rain is used for describing rain, snow, sleet or other similar precipitation from the sky that have been polluted by acids such as sulphuric acid and nitric acid. Such acids are formed when pollution from industry, automobiles, heating and other similar sources combine with the moisture present in the atmosphere. The most common pollutants that cause acid rain are sulphur dioxide, and nitrogen oxide.In addition to acid rains, the acids may also reach earth by themselves without rain. Such dry deposits also cause considerable pollution.
Acid rain affects humans adversely by polluting lakes, rivers and streams, which kills aquatic life of the polluted water bodies. Acid deposition also damage soil and forests. In addition it damages structures such as buildings, bridges and monuments built by humans.
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