smog

S0498400 (smŏg, smôg)n.1. Fog that has become mixed and polluted with smoke.2. A form of air pollution produced by the photochemical reaction of sunlight with hydrocarbons and nitrogen oxides that have been released into the atmosphere, especially by automotive emissions.

[sm(oke) + (f)og.]

smog′gy adj.smog′less adj.

smog

(smɒɡ) n (Physical Geography) a mixture of smoke, fog, and chemical fumes[C20: from sm(oke + f)og¹] ˈsmoggy adj

smog

(smɒg, smɔg)

n. smoke or other atmospheric pollutants combined with fog in an unhealthy or irritating mixture. [1900–05; sm (oke) + (f) og] smog′gy, adj. -gi•er, -gi•est.

smog

(smŏg)1. A form of air pollution produced when sunlight reacts with hydrocarbons and nitrogen compounds released into the atmosphere, especially from automobile exhaust. Smog is common in many large cities, especially during hot, sunny weather. It appears as a brownish haze and can irritate the eyes and lungs.2. Fog that has become polluted with smoke, especially smoke from burning coal.

smog

Air pollution caused by combined smoke and fog or (photochemical smog) by sunlight acting on vehicles’ exhaust gases.

Thesaurus

Noun

smog - air pollution by a mixture of smoke and fogsmogginessportmanteau, portmanteau word, blend - a new word formed by joining two others and combining their meanings; "`smog' is a blend of `smoke' and `fog'"; "`motel' is a portmanteau word made by combining `motor' and `hotel'"; "`brunch' is a well-known portmanteau"air pollution - pollution of the atmosphere; "air pollution reduced the visibility"

smog

noun exhaust fumes, pollution, fog, haze, vapour, pea-souper (Brit. informal) Cars cause pollution, and both smog and acid rain.

Translations

烟雾

smog

(smog) noun fog mixed with smoke and fumes from factories, houses, vehicles etc. Some big cities have a problem with smog.烟雾

smog

(smŏg) [smoke+fog], dense, visible air pollutionair pollution,
contamination of the air by noxious gases and minute particles of solid and liquid matter (particulates) in concentrations that endanger health. The major sources of air pollution are transportation engines, power and heat generation, industrial processes, and the
..... Click the link for more information. . Smog is commonly of two types. The gray smog of older industrial cities like London and New York derives from the massive combustion of coal and fuel oil in or near the city, releasing tons of ashes, soot, and sulfur compounds into the air. The brown smog characteristic of Los Angeles and Denver in the late 20th cent. is caused by automobiles. Nitric oxide from automobile exhaust combines with oxygen in the air to form the brown gas nitrogen dioxide. Also, when hydrocarbons and nitrous oxides from auto emissions are exposed to sunlight, a photochemical reaction takes place that results in the formation of ozone and other irritating compounds. In some instances, atmospheric pollutants accumulate and become concentrated when air movement is stopped by a temperature inversiontemperature inversion,
condition in which the temperature of the atmosphere increases with altitude in contrast to the normal decrease with altitude. When temperature inversion occurs, cold air underlies warmer air at higher altitudes.
..... Click the link for more information. : Usually the air is warmer at the earth's surface and colder above; in a temperature inversion a layer of warm air forms above and holds down a layer of cool air at the ground. Smog usually results in reduced visibility, irritation of the eyes and respiratory system, and damage to paint, metal, rubber, and other materials. Prolonged smogs (generally caused by temperature inversions) are often lethal to persons with respiratory ailments. As the result of an unremitting smog in 1948 in Donora, Pa., more than 5,000 persons were reported ill and the deaths of 20 persons were recorded. In London, smog accounted for the deaths of more than 4,000 persons in 1952 and 106 persons in 1962.

Smog

the severe air pollution over large cities and industrial centers. There are two types of smog. One is a thick fog that contains smoke or gaseous industrial wastes as, for example, in London; the other is a pall of corrosive gases and aerosols in high concentrations (without fog). The latter type arises under the effect of ultraviolet solar radiation in the atmosphere as a result of photochemical reactions occurring in the exhausts of motor vehicles and the gaseous wastes of chemical plants as, for example, in Los Angeles. Smog is usually observed when there is low atmospheric turbulence and, consequently, an even distribution of air temperature with height, especially in temperature inversions during a calm or a slight wind.

Smog, which reduces visibility and accelerates the corrosion of metals and man-made structures, is also harmful to human health. Intense and prolonged smog can be a cause of increased morbidity and mortality.

smog

[smäg] (meteorology) Air pollution consisting of smoke and fog.

smog

A condition in which the surface visibility is reduced because of smoke particles suspended in the moist air.

smog

a mixture of smoke, fog, and chemical fumes

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Synonyms for smog

noun exhaust fumes

Synonyms

Synonyms for smog

noun air pollution by a mixture of smoke and fog

Synonyms

Related Words