Environment is the sum of substances & forces external to the organism in such a way that it affects the organism’s existence. In relation to man, the environment constitutes of air, land, water, flora and fauna because these regulate the man’s life. Environment is a multi-dimensional systems of complex interrelationships in a continuing state of change. By environment we mean not only our immediate surrounding but also a variety of issues connected with human activity, productivity, basic living and its impact on natural resources such as land, water, atmosphere, forests, dams, habitat, health, energy resources, wild-life etc. Like other animals man depends on environment and becomes an environmental factor with respect to other members in an ecosystem.