If 2020 taught us anything its that there is a lot of science out there-and a LOT of “junk science”, as well! There were ads everywhere for new products to filter, purify, clean, etc the air you breathe in. BUT-how do they actually work? And what’s the difference? Airflow 101 Air is tricky-you can’t see it, but it behaves almost like a liquid in the way it moves. That’s because it, too, is made up of all sorts of particles. Some are as small as atoms (like the oxygen that kee