View source for Los angeles (photochemical) smog



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== Los Angeles (photochemical) smog ==
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<div class="definition"><div class="short_definition">Type of [[air pollution]] characterized by high levels of [[ozone]]  and low visibility, typically found in cities located in a valley (e.g., Los Angeles, Denver, Mexico  City).</div><br/> <div class="paragraph">Sunlight, oxides of [[nitrogen]], and [[hydrocarbons]] (the latter two of which arise from automobile  exhaust) are all required in order for [[smog]] formation to occur. The most severe episodes occur  when a strong [[temperature inversion]] caps the location and traps the pollutants. The [[degradation]]  in [[visibility]] is associated with the [[light scattering]] due to particulate matter. <br/>''See'' [[London (sulfurous)  smog]].</div><br/> </div>
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