For Photochemical Smog we have terms and definitions in 5 topics. The topics are Air Quality, Atmospheric Chemistry, Climate, Environment and Physical Geography.

Photochemical Smog (Air Quality)

Produced when hydrocarbons and oxides of nitrogen combine in the presence of sunlight to form ozone

Photochemical Smog (Atmospheric Chemistry)

Natural and artificially emitted hydrocarbons in the presence of oxides of nitrogen undergo photochemical reactions which produce a cloud of toxic chemicals including ozone and a variety of caustic agents. This process is powered by sunlight and some of the products, such as ozone, reach a peak soon after photon flux from the sun reaches a maximum, around midday. The thermal inversions often associated with some cities can lead to a dangerous buildup of smog in urban areas. Human deaths have been attributed to photochemical smog since the Industrial Revolution in cities such as London and New York. [Science; v.241; p.1473; 1988.] [Atmospheric Environment. Part A, General Topics; v.26A; p.625; 1992.]

Photochemical Smog (Climate)

Air pollution caused by chemical reactions among various substances and pollutants in the atmosphere.

Photochemical Smog (Environment)

Air pollution caused by chemical reactions of various pollutants emitted from different sources. (See

Photochemical Smog (Physical Geography)

Photochemical smog is a condition that develops when primary pollutants (oxides of nitrogen and volatile organic compounds created from fossil fuel combustion) interact under the influence of sunlight to produce a mixture of hundreds of different and hazardous chemicals known as secondary pollutants. Also see industrial smog.

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