"Bad Day to Breathe"

That's what my Star-Tribune e-mail update said. As the article points out:
State pollution control officials issued an "unhealthy for all" air pollution alert Tuesday for the Twin Cities, the first time that level has been reached in at least 25 years. A mass of stagnant air has covered much of the southern part of Minnesota since Saturday, allowing fine particles from car exhaust, fireplaces, factories and other sources to accumulate in the air.



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