… Ride for free on Clean Air Day! … Ride for free on Clean Air Day! California suffers from some of the worst air quality in the country. Collectively, we have … air in your community. Click here and make a pledge to clear the air. One of the easiest ways to do that is to take public transit. On Wednesday, October 1 , California Clean Air Day, we'll make it even easier for you by letting you ride for free! …