As heat wave lingers, so does bad air quality

Friday looks like another of those muggy days that keep air pollution trapped near the ground. The Pollution Control Agency has issued an air quality advisory for the Twin Cities and Rochester from noon to midnight. Conditions got bad enough on Wednesday that the agency upgraded its advisory to a health alert.
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Friday looks like another of those muggy days that keep air pollution trapped near the ground. The Pollution Control Agency has issued an air quality advisory for the Twin Cities and Rochester from noon to midnight. Conditions got bad enough on Wednesday that the agency upgraded its advisory to a health alert.

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Ozone level going up along with heat and humidity

Bad air will be part of the midweek heat wave that's settling over Minnesota. An elevated ozone level has prompted the Minnesota Pollution Control Agency to issue a health advisory through Wednesday night for the Twin Cities and Rochester.

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The American Lung Association released its "State of the Air" report Wednesday and has given Ramsey County an "F" for "short-term particle pollution." That's down from a "B'' in 2009, a "C" in 2010 and a "D'' in 2011. Overall, Minnesota earned better grades for "high ozone days," but lower grades for "high particle pollution days."

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