Latest Breaking News On - Nhealthy pollution from wildfire smoke has become dangerously common - Page 1 : comparemela.com

A decade ago, about 200,000 Californians lived in areas where they were exposed to extreme smoke. By 2020, 4.5 million did.

United statesSierra nevadaSan joaquin valleyCentral valleyStanford universityKari nadeauDillon bergin muckrockKatelyn odellMolly petersonStanford burkeMarshall burkeGeorge levinesMarissa childsStanford doerr school of sustainabilityUniversity of wisconsinColumbia university brown institute for media innovation