The introduction of harmful substance or products in the environment is called pollution. There are three major kind of pollution they are Air pollution, Water pollution and noise pollution. In the above three air pollution is the most dangerous one to the environment. The main cause for air pollution in cities is the traffic and the amount of polluted air released from the vehicles. The other main cause is the polluted air released from factories and industries and the polluted air will mix with the atmosphere and this happens to be the cause of ACID RAIN. Population growth is also a cause for air pollution because the increase in population brings the need for increase in production in other words, There will be a increase in the use of natural resources which gives raise to environmental pollution in general and air pollution in particular. Steps are taken by the government to control air pollution but all the above factors like using vehicles, industries and growth in population cannot be stopped. But fortunately we can control the usage of vehicles and the population growth. Every individual should be aware of this air pollution and act accordingly. Without the help of public this air pollution cannot be reduced.