Definition of photochemical smog in English:

photochemical smog

noun

mass noun

单词	photochemical smog
释义	Definition of photochemical smog in English: photochemical smog noun mass noun Haze in the atmosphere accompanied by high levels of ozone and nitrogen oxides, caused by the action of sunlight on pollutants. Example sentencesExamples Ozone at ground level can be manufactured as part of photochemical smog. In sunny, still weather we actually get photochemical smog in York - and each speed bump is adding its own contribution. In summer the city suffers high levels of photochemical smog, and in winter high levels of haze are common. Nitrogen oxides, carbon monoxide, and unburned hydrocarbons are the main exhaust pollutants and they are involved in the production of damaging photochemical smog. One project they have planned is the ultra-sensitive detection of short-lived atmospheric species that control photochemical smog formation.
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