| 单词 | photochemical smog |
| 释义 | > as lemmasphotochemical smog photochemical smog n. a condition of the atmosphere attributed to the action of sunlight on hydrocarbons and nitrogen in it, and characterized by the presence of aerosols and increased ozone and nitrogen oxides and by effects that include irritation of the eyes, damage to plants, and visibility reduced to a mile (1.6 km) or less. ΘΚΠ the world > physical sensation > cleanness and dirtiness > dirtiness > pollution or defilement > environmental pollution > [noun] > bad air > specific smokiness1587 mephitism1801 smog1905 photochemical smog1957 vog1969 the world > the earth > weather and the atmosphere > weather > cloud > mist > [noun] > thick mist or fog > fog mixed with smoke > specific photochemical smog1957 1957 Rep. Air Pollution Foundation (U.S.) No. 21. 1 It is now realized that Los Angeles' smog is primarily a reaction between organic matter and nitrogen oxides in the presence of sunlight. The need for irradiation to produce the reaction has led to the designation ‘photochemical’ smog. 1976 New Yorker 16 Feb. 74/2 Los Angeles is perhaps the best-known victim of the bus and the automobile; photochemical smog, the distinctive pollutant of these vehicles, made its first recorded appearance in Los Angeles in 1943. 1990 Green Mag. Apr. 79/2 (caption) Solvents..help create photochemical smog which harms lungs and plants. < as lemmas |
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