
Salt Lake City makes the Associated Press top news stories list... for being dangerously polluted.
Northern Utah's valleys have been smothered by an "inversion," a blanket of warm air that keeps cold air close to the ground and traps everything: car exhaust, factory emissions, even hard-to-see particles from furnaces or a cozy fireplace.
Together they form a cloudy shroud that has been described as soup, gunk, smog, and a few other titles that can't be printed.
Read the rest of the story here.
Read all about inversions here.
And a fun little graphic from the Utah Air Quality Center:

Who knew? There's a whole terror-alert style color code for air quality.
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