ENG311: Air pollution

Air pollution is common in developes countries. There are crowds of people and large industries in their big cities. The man causes of air pollution are: smokee from factorie, car exhaust fumes and ger district in Mongolia etc. Chemical industries do not use cleaning equipment, so the city has a large number of sick and plants have stopped growing. Air containsoxygen, and people need oxygen to live. If you live a near big city you may see a rust colored haze covering the city like a blanket.Sometimes natural events such as dust storm, forest fires ar erupting volcanoes pollute the air. But most of time people cause air pollution. Burning trash can pollute the air.