Listening to the radio the other day, I learned something interesting about the risks of inhaling smoky air. The smallest particulates in wildfire smoke are less than 2.5 µm in diameter. This is incredibly tiny—it’s about 30 times smaller than the thickness of human hair. Such a minuscule size means these particulates can get deep into your lungs when inhaled, and even work their way into your bloodstream1. Read more...