Smog, the visible sign of unhealthy air, cloaks the Charlotte skyline in 2011. Levels of invisible ozone rose Tuesday afternoon.
Smog, the visible sign of unhealthy air, cloaks the Charlotte skyline in 2011. Levels of invisible ozone rose Tuesday afternoon. Todd Sumlin tsumlin@charlotteobserver.com
Smog, the visible sign of unhealthy air, cloaks the Charlotte skyline in 2011. Levels of invisible ozone rose Tuesday afternoon. Todd Sumlin tsumlin@charlotteobserver.com

Why Charlotte’s air could hurt you this afternoon

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