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Nitrogen
Oxides
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Dry
Air is 78% Nitrogen (N2), 21% Oxygen (O2)
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Heating air to
high temperatures forms NO• (motor
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vehicles,
fossil-fuel power plants, lightning)
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NO• is an ozone
precursor and also reacts directly with
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ozone to destroy
it
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Volatile
Organic Compounds (VOC’s)
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VOC’s
continuously emitted by fuel spills, motor vehicles,
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trees, air
fresheners, paints, and countless other sources
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OH• hydroxyl radical is the
atmosphere’s “natural
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detergent” that
cleans VOC’s from the air by initiating the
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process that
converts them into carbon dioxide and water
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