December 20, 2019 7:09 pm Carbon Dioxide: The Invisible Indoor Air Pollutant Poor ventilation and air quality in California’s schools could be impacting students’ health and academic performance. Jessica Aguirre reports. US & World Videos 2:37 San Francisco State adds climate justice course to graduation requirement 2:40 In the news: Bay Area Super Bowl, NBA All-Star weekend, vehicle collides into pub parklet 2:35 Checking in on California water, snow levels 4:55 Political analysis: Musk on the move 1:59 In the news: SF man survives being shot several times, Momeni sentencing date, runner uses GPS to create art