(Trent Nelson | The Salt Lake Tribune) Poor air quality obscures the Oquirrh Mountains and downtown Salt Lake City, as seen from the University of Utah on Friday, Dec. 3, 2021.(Trent Nelson | The Salt Lake Tribune) Poor air quality obscures the Oquirrh Mountains and downtown Salt Lake City, as seen from the University of Utah on Friday, Dec. 3, 2021.(Trent Nelson | The Salt Lake Tribune) Poor air quality obscures the Oquirrh Mountains and downtown Salt Lake City, as seen from the University of Utah on Friday, Dec. 3, 2021.(Trent Nelson | The Salt Lake Tribune) Poor air quality in Salt Lake City on Friday, Dec. 3, 2021.