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smog

   Also found in: Dictionary/thesaurus, Acronyms, Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
smog (smg)
n.
1. Fog that has become mixed and polluted with smoke.
2. A form of air pollution produced when sunlight causes hydrocarbons and nitrogen oxides from automotive emissions to combine in a photochemical reaction.

smog,
a polluting combination of smoke and fog in the atmosphere.

smog
smoke-laden fog, a form of environmental pollution.

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.


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According to the weatherman, the smog is expected to last for 24 hours at least.
Which is why two bills making their way through the state Legislature would mandate smog tests, either every year or every other year, for cycles built after 2000.
SMOG engulfs Beijing's Bird's Nest Olympic stadium - just weeks before the Games begin.
 
 
 
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