13.2 Air Pollution

. Air Pollution Earth is surrounded by a gaseous envelope which is called atmosphere. The gaseous blanket of the atmosphere acts as a thermal insulator and regulates the temperature of the earth by selectively absorbing The UV rays of solar radiation. The adverse effects of pollution include depletion of Ozone by Chlorofluorocarbons or CFCs, used as refrigerants and global warming by elevated CO (industries, deforestation, and partial combustion) . The alterations or changes in the composition of the earth’s atmosphere by natural or human activities (anthropogenic factors) are referred as Air Pollution . Pollutants include the abundant presence of solid, liquid or gaseous substances produced by human or natural activity. The nature and concentration of a pollutant determines the severity of detrimental effects classified according to the types of environment that is affected. They are mainly air, water and soil pollution.