2. Atmosphere is mixture of gases that surround sphere of earth which we call AIR. A normal human being breathes about 25000 liter/day. (about 30 to 60 kg) A ir
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5. 06/08/09 XIDAS Causes of Air Pollution Release of thousand tones of a variety of air pollutants into the atmosphere. More then 7,50,000 man- made chemicals present in our environment and to these 1000-2000 new one added to every year.