Meteorological conditions and land forms can influence air pollution concentrations like in cities located in valleys. That atmosphere can carry clouds to where it is then precipitated as acid rain thus causing serious damage to vegetation, waterways and constructions. There are also many more forms of air pollution like radioactivity. This one can not be seen or smelled. A very good example is what happened at Chernobyl, an accident at a nuclear power station, in Ukraine, in 1986, an explosion took place and many people were exposed to radioactivity.
Air pollution is caused by lots of different pollutants.
By 1900, air pollution became a serious problem and it has increased as time passes and population increases together with the growth of industrial centers. The Clean Air Act, to help protect our environment. It is intended to reduce air pollution and acid rain. Deadlines to meet clean air standards have been set to control the amount of pollutants that plants can produce. Also the Environmental Protection Agency helps protect environment.