Air Pollution is still a big problem for all countries today: especially in the big cities, constant traffic, or thousands of chimneys emit dark skies of the industrial park .
photochemical fog is a term used to describe a form of air pollution occur in the troposphere of the atmosphere, caused by sunlight acting on the engine exhaust, industrial emissions ... create compounds that are harmful to human health, such as ozone, aldehydes and PAN. Once in the stratosphere, ozone protects the Earth from ultraviolet avoided but when ozone near the ground to high concentrations it will kill the plant tissue, making the plants vulnerable, harming the biological communities, reduced agricultural productivity and endanger people. In the long term, to limit and control the state of photochemical fog to reduce emissions of hydrocarbons and nitrogen oxides from motor vehicles or industrial manufacturing process. That is the headache of many scientists, researchers and policy makers today.
Air Pollution is also a serious problem in our country, especially in big cities. But for the current level, our country has no photochemical fog phenomenon. Only if we do not happen to have a positive corrective measures.
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