Tougher emissions rules helped cut US air pollution deaths in half

There's little doubt that air quality has generally improved in the US in recent decades, but quantifying that improvement has been difficult. However, a recently published University of North Carolina study might have produced a more tangible figur... https://ift.tt/2PHisME support@endlesssupplies.ca (Endless Supplies .Ca) October 20, 2018 at 11:03PM