The wildfires that have laid waste to vast parts of California are presenting residents with a new danger: air so thick with smoke it ranks among the dirtiest in the world. On Friday, residents of smog-choked Northern California woke to learn that their pollution levels now exceed those in cities in China and India that regularly rank among the worst. In the communities closest to the Paradise fire, an apocalyptic fog cloaked the roads, evacuees wandered in white masks and officials said respiratory hospitalizations had surged. Nearly 200 miles to the south, in San Francisco, the smoke was so thick that health warnings prompted widespread school closings. Even the city’s cable cars were yanked from the […]