Degradation of quality of environment (air, water and soil) is known as pollution. Odum (1971) stated that pollution is an undesirable change in the physical, chemical or biological characteristics of our air, land, and water that may or will harmfully affect human life, industrial progress, living conditions, and cultural assets. Southwick (1976) defined that pollution is the unfavourable alteration of our environment, largely as a result of human activities.
A clean and unpolluted environment is the basic necessity for the happy and healthy life of man. Due to man himself the present day environment around the globe is rapidly becoming unsuitable for human survival. They are destroying the very environment on which they survive. The process of urbanisation and industrialisation has, no doubt, made the human life more comfortable, on this planet. There has also been rapid advancement in the field of agriculture By developing new varities of wheat, rice and other crop plants, man has succeeded in increasing the yield from these manyfold. Better irrigational facilities, use of chemical fertilizers, pesticides and insecticides, no
doubt, have accelerated the green revolution. Increasing human population produces a strain on the resources and availability of energy and materials. Use of fuels. fertilizers, agrochemicals (pesticides) and disposal of waste materials introduce many unwanted substance in the environment. These substances gradually degrade the quality of air, water and soil, which is called pollution. Environmental pollution and population explosion, if not checked in time. will be potentially dangerous to the very survival of man on this little planet.
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