Pollution is the most important part to be removed in our world. pollution is causing much damage to man kind. pollution is also made by humans. humans are the only creatures that destroy world for their greed and need. pollution are of four kinds they are soil,air,water and sound. they are caused by humans only. the major cause of pollution is urbanization and industrialization. due to pollution humans are are getting global warming to earth and even ozone layer is depleting and causing UV rays to come on earth.