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...Introduction to ecology by prof a balasubramanian centre for advanced studies in earth science university of mysore the term is widely used on various contexts magazines dailies radio and television mass media communications government public meetings it commonly whenever discussions decision making pl ns legal allocations are made conserve natural resources control pollution problems protect life from risks general recognized as one sciences considered be concerned with nature interrelations living world has been derived greek word oikos meaning habitation or house place scientific study organisms at home which called environment refers those parts total set circumstances surround an organism group these two terms inseparable involves relation their totality man his application other disciplines like palaeoecology oceanography hydrology limnology climatology zoogeography geomorphology physics chemistry...