Abstract
The emissions of reactive volatile organic compounds into the atmosphere from biogenic and anthropogenic sources and the subsequent interaction of these organic compounds with oxides of nitrogen in the presence of sunlight lead to the formation of photochemical air pollution, now recognized to affect much of Europe, the United States, and many regions and urban areas elsewhere around the world. The past decade has seen the realization that emissions of organic compounds from biogenic sources (principally from vegetation) may be comparable to, or even dominate over, emissions of organic compounds from anthropogenic sources. Biogenic organics therefore play an important role in the chemistry of the troposphere and influence control strategies aimed at reducing the exposure of human populations to ozone and other manifestations of photochemical air pollution. Organic compounds also are involved in the formation of secondary organic aerosol, the formation of acids in the atmosphere, the potential for global warming, and, for chlorine‐ and bromine‐containing compounds, stratospheric ozone depletion.
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