Vegetative plants and trees are called Autotrophy because they can produce their own food through the process of photosynthesis. This category is a primary productive unit and all other living organism depends on the vegetation for acquiring food.

Photographs like insects, animals, birds and all human beings cannot produce their own food. Some microorganisms like bacteria, fungus, microbes, etc. derive food from dead plants and animals. Thus all the organisms are interdependent for their survival.

Human being is always adjusting to ever-changing environment and in the past he never attempted to alter it. But after scientific advancements in every sphere of life, there has been tremendous increase in the wants and desire of man causing great pressure on natural resources resulting in man’s interference with nature.

There is an all round development and progress in science and technology with corresponding and expanding industrialization and urbanization, a variety of new products are being introduced which in turn, increase environment pollution.

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Environmental pollution occurs when the built-in central mechanism fails to cope up with increasing and expanding pollution-agents, which thus gain the better of environ­ment and leave it limping and inhospitable.

It therefore, needs pollution management to leave nature as friendly as possible for the future generation as well as to control our greed for exploitation of natural resources.