Environment and its Pollution

Environment and its Pollution   Air Composition of air is nitrogen 78.084% oxygen 20.946%. argon 0.934% carbon dioxide 0.033%.     Region of air present around the earth is called atmosphere.     Main layers from the surface of earth upwards   (a)  Troposphere       (b)  Stratosphere (c)  Mesosphere        (d)  Thermosphere.       Most of […]

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