Air pollution means the contamination of air by smoke, harmful gases, dust etc. Air is a very important element of our environment. No creature can live without air. It is the life giving force. Clean air is essential for life but polluted air is very harmful. Air can be polluted in many ways. The most common agent that pollutes air is smoke. Smoke is produced when we cook food, burn bricks and refuse. It is also produced when we melt pitch for road construction innumerable buses, trucks and cars plying big cities use petrol, diesel and oil. When these fuels are burnt, they create smoke and pollute the air. Mills and factories in large industrial areas also cause serious air pollution. Railway engines and power houses also pollute air. However, it is really very difficult to prevent air pollution, but it is possible to reduce its quantity. We can make less use of motor vehicles and avoid the use of vehicles older than 20 years. Again, we can try to increase the use of solar energy, which does not pollute air Moreover, we have to stop cutting down trees in large number because trees absorb the poisonous carbon gases from the atmosphere and keep the environment good. So, to ensure a healthier and happier life we must control air pollution.