smog

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Related to smogless: smoggiest

smog

(smog),
Air pollution characterized by a hazy and often highly irritating atmosphere resulting from a mixture of fog with smoke and other air pollutants.
[smoke + fog]

smog

a polluting combination of smoke and fog in the atmosphere.

smog

Photochemical smog Environment An acronym of smoke and fog caused by combustion of often synthetic materials with production of noxious volatile byproducts; smog mortality ↑ substantially when smoke and SO2 levels exceed 750 µg/m3 Clinical Dyspnea, acute exacerbation of COPD; smog triggers asthmatiform Sx–wheezing and markedly ↑ respiratory effort or, if intense, marked cyanosis–PaO2 < 50 mm Hg; PaCO2 50-100 mm Hg, CHF, cor pulmonale. See Air pollution, Bhopal, Clean Air Act, Particular air pollution, Pollution, Yokohama asthma.

smog

(smog)
A hazy and often highly irritating atmosphere resulting from a mixture of fog with smoke and other air pollutants.
[smoke + fog]

smog

smoke-laden fog, a form of environmental pollution.
References in periodicals archive ?
The reader has known exactly where the gun was hanging from page one, line one: "I was born twice: first, as a baby girl on a remarkably smogless Detroit day in January of 1960; and then again, as a teenage boy, in an emergency room near Petoskey, Michigan, in August of 1974.
Both offer paddle-boat tours that let visitors experience the blue water, the smogless sky and the tall pines that seem to link the two places.
It is a rare, smogless, crisp California morning, a chance glimpse at what was that soon won't be.