A dirty layer of winter air is hovering over Salt Lake City as an inversion sets in that is expected to last for days, if not weeks. National Weather Service meteorologist Pete Wilensky said Friday that a high-pressure system over much of the West is leading to the murky winter air that causes problems for people with asthma and other respiratory illnesses. Wilensky says the inversions are expected to last through next week with air quality gradually deteriorating.
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