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Kim Biggs

When officials declare an Air Quality Action Day due to high ozone levels, those who exercise vigorously outdoors are at increased risk of breathing problems, as are children, the elderly, and those with lung diseases such as asthma. (Credit: CBS)

This Summer Has Been One Of The Worst For Air Quality

This summer may be one of the hottest in recent memory, but it is also one of the worst for air quality.

WBBM Newsradio–08/03/2012