The EPA has proposed lowering the annual average soot exposure limit, predicting such a move would yield tens of billions of dollars per year in public health benefits. But the proposal, which would overturn a Trump-era decision that left the regulation unchanged, is already drawing criticism from industry, even though it fell short of environmentalists' expectations. POLITICO’s Alex Guillén reports.  Josh Siegel is an energy reporter for POLITICO. Alex Guillén is an energy reporter for POLITICO Pro. Kara Tabor is an audio producer for POLITICO. Raghu Manavalan is a senior editor for POLITICO audio. Jenny Ament is the executive producer of POLITICO’s audio department. Learn more about your ad choices. Visit megaphone.fm/adchoices