We live in British Columbia, and now that we have "wildfire season" every year, it's very easy to tell the difference between good air and bad air. I suspect a

We live in British Columbia, and now that we have "wildfire season" every year, it's very easy to tell the difference between good air and bad air. I suspect a lot of people are jumping on this as well for the same reason - Silicon Valley is in California, and they're harder hit than anyone else with this.