A new proposal could be the boldest Utah has seen to clean up our air. The surprise, says Robert Gehrke, is who is sponsoring it.

New bill would seek to cut air pollution in Utah by half by taking some aggressive measures that past Republican lawmakers have opposed.

(Rick Egan | The Salt Lake Tribune) A winter inversion is photographed Wednesday, Dec. 4, 2019, looking west from Little Cottonwood Canyon.