For Smog we have terms and definitions in 14 topics. The topics are Air Quality, Atmospheric Chemistry, Automotive, Climate, Climatology, Energy, Environment, Geography, Natural Gas, Oil, Ozone Protection, Physical Geography, Satellite Meteorology and Science.

Smog (Air Quality)

A term used to describe many air pollution problems. Smog is a contraction of smoke and fog; in California, it describes the irritating stagnant haze resulting from the sun's effect on pollutants in the air

Smog (Atmospheric Chemistry)

This is a term used to describe a mixture of smoke and fog. Smog occurs when high concentrations of moisture is combined with smoke (often containing oxides of sulfur and nitrogen) in the presence of high temperatures or thermal inversions and the absence of wind. These conditions cause polluted air to stagnate over industrial areas and can create a respiratory health hazard. Large coastal industrial centers with surrounding high ground are more prone to smog. There is often a diurnal (over a day) variation in the process of smog formation because one of the necessary components for its formation is sunlight. [Journal of Environmental Health; v56; p38; 1994.] [Science News; v144; p326; 1993.]

Smog (Automotive)

The cloud of airborne pollutants visible over major population centers.

Smog (Climate)

Air pollution associated with oxidants.

Smog (Climatology)

A natural fog made heavier and darker by smoke and chemical fumes

Smog (Energy)

A mixture of smoke and fog generally used as an equivalent of air pollution, particularly associated with oxidants.

Smog (Environment)

A dense, discolored radiation fog containing large quanities of soot, ash, and gaseous pollutants such as sulfur dioxide and carbon dioxide, responsible for human respiratory ailments. Most industrialized nations have implemented legislation to promote the use of smokeless fuel and reduce emission of toxic gases into the atmosphere.

Smog (Geography)

Mixture of particulate matter and chemical pollutants in the lower atmosphere, usually over urban areas.

Smog (Natural Gas)

Brown summer haze that intermittently forms over some cities. It is comprised of ground-level ozone (nitrogen oxides, volatile organic compounds and fine particulates).

Smog (Oil)

Brown summer haze that intermittently forms over some cities. It is comprised of ground-level ozone (nitrogen oxides, volatile organic compounds and fine particulates).

Smog (Ozone Protection)

The entrapment of pollutants in still air or fog. Photochemical smog occurs in the troposphere where sunlight causes chemical reactions in a smog, one effect of which is the generation of ozone.

Smog (Physical Geography)

Generic term used to describe mixtures of pollutants in the atmosphere. Also see industrial smog and photochemical smog.

Smog (Satellite Meteorology)

Originally a combination of smoke and fog, this term is now used to describe mixtures of pollutants in the atmosphere.

Smog (Science)

A mixture of smoke, water droplets, and gases trapped near the ground

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