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SALT LAKE CITY (AP) -- In the winter, they're inversions. In the summer, we call them ozone alerts.
Air-quality officials are urging Utahns to drive less to avoid adding tailpipe emissions to hot, dirty air. It's a bad mix.
Friday and Saturday could be red-alert days in Salt Lake, Davis and Weber counties, with temperatures reaching 100 degrees. People with breathing problems will need to avoid the heat and stay indoors.
(Copyright 2007 by The Associated Press. All Rights Reserved.)
