Environment has different meaning for different people. Most definitions includes the physical, chemical and biological components that influence the life of an organism. Among biological component, the human (homo sapiens) occupies a central position as one of the organisms. A recent development (post-1972 stockholm conference ) has been the emphasis on impact of man itself on its own environment i.e., The various anthropogenic activities affecting the environment at global level. For instance, several socio-economic, cultural and political factor also influence the basic physical, chemical and biological components (and their interactions) of the environment. As a result persons led by different discipline have approach the environment in different ways, which should be evident from the various definition of the environment proposed by them. Such definition of the environment on the web are as follows:
· The sum of all the external conditions that are affecting the life, development and survival of an organism.
· All the external factors, conditions and influences that affect an organism or a biological community.
· Surrounding in which an organization operators, includes air, water, land natural resources, flora, fauna, humans and their interaction.
· The interaction with climate, soil, topography, and other plants and animals in any given area. An organism’s environment influences its form, behaviour and survival.
· An complex set of physical, geographical, biological, social, cultural and political condition that surround an individual or organism and that ultimately determines its form and nature of its survival.
· The combination of all physical and other factor and condition that influence the development and survival of an organism or group of organisms.
· The component of the earth that include: (1) air, land and water; (2) The layer of the atmosphere; (3) organic and inorganic matter and living organisms; (4) the interacting system that include components referred to in (1) to (3); and the socio-economic, environmental health, culture and other items referred to in the definition of the environmental effect.
· The Non-genetic conditions and circumstances that affect a person’s conduct and health.
· The conditions, influences, or forces which affects the desirability and value of property, as well as the effect on people’s lives.
· Physical and interpersonal surroundings that can affect mood and behaviours in people with dementia.
· The social environment of an individual is culture that he or she was educated and / or lives in, and the people and institutions with whom the person interacts.
The term environment etymologically means surrounding. Thus, environment is the complex of many things (light, temperature, soil, water, etc.) which surround an organism. Any external force, substances or condition, which surrounds and affects the life of an organism in any way, becomes a factor of its environment. These factor have been variously called environmental factors, ecological factors or simply factors and may be living (biotic). The sum of all these living and Non-living factors makes the environment of an organism. The place, where an organisms lives – habitat, indeed presents a particular set of environmental conditions – the environmental complex.
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