SFPL has said that they have air filters in some of their locations & the mayor tweeted that people can go sit around in the library if they have trouble breath

SFPL has said that they have air filters in some of their locations & the mayor tweeted that people can go sit around in the library if they have trouble breathing. https://twitter.com/mayoredlee/status/918477373657325568 https://twitter.com/mayoredlee/status/918477373657325568