For the average American, we @StanfordECHOLab calculate that cumulative smoke exposure (PM2.5 exposure on each day, summed across days) through mid-2023 is already way worse than total cumul exposure in every year since 2006. And main fire season in West is just getting started. pic.twitter.com/0Oj0bmcvVQ

— Marshall Burke (@MarshallBBurke) July 7, 2023