Air pollution is harmful gases in the air such as gases, smoke and dust. This things cause air pollution. Is the air around us is not clean or pure then it becomes difficult for human, animals and plants to breath. The things that pollute the air are called pollutants. There are two types of pollutants

·         Primary pollutants

·         Secondary pollutants

Primary pollutants are the pollutants that are released into the air to make it unclean.

Secondary pollutants are the pollutants by which chemical reaction takes place and they produce more harmful gases. These gases cause acid rain, global warming, green house gas affect.