(Trent Nelson | The Salt Lake Tribune) A train yard on the north end of Salt Lake City on Tuesday Feb. 5, 2019. A lawmaker would like to help Union Pacific and other rail carriers acquire cleaner "freight switchers," locomotives that assemble and rearrange train cars for long hauls.
Brian Maffly has worked for The Tribune off and on since 1994. Maffly roams Utah, covering public land and environment.