Breathing San Francisco air for a day is equivalent to smoking 11 cigarettes as city chokes in wildfire pollution
The air quality in San Francisco is equivalent to the air in Dhaka, Bangladesh, and is believed to be worse than Kolkata, India.
Schools and tourist attractions in the San Francisco Bay Area were shut down and residents asked to stay indoors due to the smoke from California's deadliest wildfire.
The wildfire air pollution made air quality levels much worse than South Asia's most polluted megacities. San Francisco ordered their cable cars to return to their stations given the Air Quality Index touched 271. This is comparable to Dhaka in Bangladesh and much worse than Kolkata in India.
San Francisco, Stockton and Sacramento were the world's three "most polluted cities" on Friday morning due to the wildfires raging in Northern California, according to a nonprofit that looks at air-quality data https://t.co/ZIgeUaazKP pic.twitter.com/fDJPfnLnXa
— CNN (@CNN) November 17, 2018