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nature : the city's main traffic pollution is automobile exhaust. Automobile exhaust to produce gasoline and diesel combustion process. Its main pollutants are carbon monoxide, nitrogen oxides, hydrocarbons, photochemical oxidants and other particles. These harmful pollutants, air pollution is the source of the flow. When the car exhaust emissions up to a certain concentration, in the sunlight of ultraviolet radiation, can occur photochemical decomposition reactions and chemical reactions and photochemical smog formation of the human body, plants, poultry will have a great incentive to the toxic effects.
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