Charlotte-Rock Hill-Gastonia MSA  Summertime Ozone Formation

Arizona’s Valley of the Sun “Brown Cloud”

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Presence of NO₂ (brown gas) results in inevitable formation of ozone

Ozone precursors

Volatile Organic Compound (VOC) Removal

Formation of Nitrogen Dioxide

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’95-’99 AM NMOC/NO_y Ratios for the Plaza Monitoring Site

Day of Week NO_x Emissions from Four Coal-fired Plants near Charlotte

I-77 Traffic Volume vs. Time of Day

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