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The word environment refers to all ecological units which are naturally present on earth in the form of land, water, air, soil, forest, sunlight, minerals, living organisms, etc. This earth is full of natural surroundings, some are biotic and some are non-biotic.
Biotic elements are those element that has life like human, bird, animal, plants and micro-organisms. Whereas non biotic elements are those which have no life like air, sunlight, water, land, soil, minerals, etc. Further it is also divided among four different spheres viz. biosphere, lithosphere, atmosphere and hydrosphere. In which, hydrosphere is the largest part on the earth among all. Life on earth has become possible due to some kind of actions and reactions between different kinds of resources that are present in environment. All the spheres contain some of the natural resources inside its