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Title: A Cleaner Breath

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Subject: Science
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Date: July 27, 2009
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Length: 9 / 2592
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Due to the increasing concentrations of hydrocarbons and NO2 in the atmosphere, scientists have found that ozone levels in "clean air" are now approximately 30 parts-per-billion (Atmospheric Chemistry). Even if the sky above you seems to be clear and blue, smog is everywhere...

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Even if the sky above you seems to be clear and blue, smog is everywhere. "It is a choking sensation every time one ventures out into the streets" (Smog). What we typically call smog is primarily made up of ground-level ozone. Ozone can be good or bad depending on where it is located...

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