Air pollution is the concentration of pollutants in the atmosphere of harmful degree,exceeding the environmental quality standards.All make the material deterioration in air quality are all air pollutants.Air pollutants known about more than 100.Their existence can be divided into two categories.One is the state of aerosol pollutants,and the other is gas pollutants.Aerosol state of the main pollutants are dust,fog,dust,Piaochen,suspended solids,and so on.Gas main pollutants are mainly of sulphur dioxide to sulfur oxides,nitrogen dioxide mainly of nitrogen-oxygen compounds,consisting mainly of carbon dioxide and oxygen compounds and carbon,hydrogen combination of hydrocarbons.Not only in the atmosphere containing inorganic pollutants,and pollutants containing machine.As human efforts to develop new substances,the atmosphere of the types and quantities of pollutants are also constantly changing.
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