Photochemical smog is produced when _________ and _________ are acted on by sunlight.

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     sulfur oxides / carbon dioxide
      ground-level ozone / nitrogen oxides
      airborne particulates / volatile organic carbon compounds
      nitrogen oxides / volatile organic carbon compounds
asked Jun 25, 2012 in Environmental Science by anonymous
    

1 Answer

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nitrogen oxides / volatile organic carbon compounds
answered Jun 26, 2012 by Geodude ~Top Expert~ (9,680 points)

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