ABSTRACT
The United Nations (UN) conference on Human Environment held at Stockholm in June 1972 stressed to take appropriate steps for the protection and improvement of human environment. The presence of solid, liquid and gaseous contaminants in the atmosphere in such quantities which damage materials and property, and cause injury to human, animal or plant life or interfere unreasonably with normal human activity and enjoyment of life is called air pollution. Emission from chimneys, exhaust from automobiles, aeroplanes and other man made activities. Agricultural insecticidal, pesticidal dusting and spraying, domestic and municipal incinerators, burning of vegetation introduces pollutants into the atmosphere. Thermo-nuclear explosions introduce radioactive pollutants. It is the amount of a simple chemical substance whose mass expressed in grams (kilograms) equals to its atomic weight. A substance which can donate or give a pair of electrons to form a coordinate bond is called a base.
