Minnesota Public Radio slideshow:
Bad air days
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In 2003, the number of days with good air quality had declined substantially, to only 44 percent of the time. (Chart by Jim Erkel, courtesy of gominnesota.org)

In 2003, the number of days with good air quality had declined substantially, to only 44 percent of the time.

(Chart by Jim Erkel, courtesy of gominnesota.org)
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