CNN: California has the most polluted cities due to wildfires

CNN: San Francisco, Stockton, and Sacramento, all located in northern California, were the most polluted cities in the world as of the morning of November 16^th. Due to the wildfires, the air in these areas has high levels of particulate matter, which is a common result following a wildfire. Public schools in San Francisco and Alameda County cancelled classes for the day. Read more about this here.