Air pollution

                        Air pollution is the introduction in to the atmosphere of  chemicals, particulates, or biological materials. That cause discomfort, diseases or death to humans, damage other living organisms. Such as food crops, or damage the natural environment. 

                       The atmosphere is a complex dynamic natural gaseous system. That is essential to support life on planet earth.stratospheric ozone depletion due to air pollution has long  been recognized as a threat to human health as well as to the earth's ecosystem.