#China has slashed #AirPollution levels the past 4 years, potentially extending the lives of its residents by an avg. of 2.4 years. If it met @WHO #AirQuality standards, that number jumps to 4.1. Analysis by Michael Greenstone in @UpshotNYT: https://www.nytimes.com/2018/03/12/upshot/china-pollution-environment-longer-lives.html?action=click&contentCollection=upshot&contentPlacement=1&module=package&pgtype=sectionfront®ion=rank&rref=collection%2Fsectioncollection%2Fupshot&version=highlights …pic.twitter.com/YVarkJ0HEM