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Toxic fog settles over Salt Lake City

Associated Press
Dr. Gary Kunkel arrives at the Utah State Capitol wearing a breathing mask before a news conference Wednesday, Jan. 23, 2013, in Salt Lake City. A group of doctors is declaring a health emergency over northern Utah's lingering pollution problem.  The U.S. Environmental Protection Agency has singled out the greater Salt Lake region as having the nation's worst air for much of January, when an icy fog smothers mountain valleys for days or weeks at a time and traps lung-busting soot.  (AP Photo/Rick Bowmer)

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The pollution has turned so bad that more than 100 Utah doctors called Jan. 23 on authorities to immediately lower highway speed limits, curb industrial activity and make mass transit free for the rest of winter. Doctors say the microscopic soot — a shower of combustion particles from tailpipe and other emissions — can tax the lungs of even healthy people.

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