How to tell if the air around us is safe to breathe

8:30am PDT - September 22nd, 2020    air quality - Engadget

The West’s 2020 fire season has been absolutely brutal, with more than 7,600 blazes spreading the length of coast, killing 35 people and charring 3.1 million acres to date. Autumn winds arrived early this year, reducing humidity and desiccating undergrowth fr…