via.fox40.com
Due to Wildfires, California Now Has the Most Polluted Cities in the World
Due to the wildfires raging in Northern California, San Francisco, Stockton and Sacramento were the world's three "most polluted cities" on Friday morning, according to Berkeley Earth, a nonprofit that aggregates data from air-quality monitoring sites. PurpleAir, which has a network of sensors around the world, also showed that California had worse air than traditional smog hotspots in India and China.