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We hear it every day at schools, colleges and universities and read about it in newspapers. So What is it? Pollution occurs when pollutants contaminate the natural surroundings which brings about changes that affect our normal life styles adversely. Pollutants are the key elements or components of pollutions which are generally wastes of different forms. It disturbs our ecosystem and the balance in the environment with modernization and development in our lives. Pollution has reached its peak by giving rise to global warming and human diseases.

Pollution occurs in different forms: Air, Water, Soil, Radioactivity, Noise, Heat/thermal and Light. Every form of pollution has two sources of

occurrence; the point (known) and non-point (un known) sources.

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