The word environment is derived from an old French word ‘ENVIRON’ means encircle. Environment connotes the sum total of the things or circumstances surrounding an organism including humans (Cunnigham et al., 1993).
Environment means the natural environment, which encompasses all the biotic and abiotic elements that form our surroundings, that is, air, land, water, forests, seas, animals , all other living and non-living elements on Planet Earth (Singh K., & Shishodia A., 2007).
Environmental science is the study of how various species interact with one another and with the non-living environment. It is a study of how all the components of nature and human societies adapt and interact. It is the study of interaction of the biotic component (plants, animals and microorganisms) among themselves and together with the abiotic component (temperature, rainfall, soil, air, fire, atmosphere and topography) (Anjaneyulu Y., 2004).
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