View source for Photochemical air pollution

== photochemical air pollution ==
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<div class="definition"><div class="short_definition">Type of [[air pollution]], such as Los Angeles [[smog]], associated with  the buildup of [[oxidation]] products formed from the [[degradation]] of [[hydrocarbons]], etc.</div><br/> <div class="paragraph">The term arises because [[sunlight]] is required to initiate [[photolysis]] reactions. [[ozone|Ozone]] and [[nitrogen dioxide|nitrogen  dioxide]] are always present in photochemically produced mixtures; often other species such  as [[peroxyacetyl nitrate]] and [[formaldehyde]] are also produced.</div><br/> </div>
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