Air Pollution Abatement-Methods & Equipment

Each man needs 30 lbs of air to breathe, 4 lbs of water to drink and 2-1/2 lbs of food to eat per day. The need for air can further be illustrated that a man can go without food for five weeks, without water for five days but without air not even five minutes. But he is generally unaware of this fact due to the simple reason that the air around us is available in plenty.