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| fog caused by cold air flowing over a body of comparatively warm water and giving the appearance of smoke or steam |
| a wind of 25?30 mph (11?13 m/sec) |
photochemical smog n.
Air pollution produced by the action of sunlight on hydrocarbons, nitrogen oxides, and other pollutants.
| photochemical smog (fō'tō-kěm'ĭ-kəl) Pronunciation Key
See smog. |