There are a few different ways I've read about far UV being deployed, one of the interesting ones is illuminating the upper few feet of a room. Exhaled breath t

There are a few different ways I've read about far UV being deployed, one of the interesting ones is illuminating the upper few feet of a room. Exhaled breath tends to rise so apparently doing just the top of the room is more effective than you might expect. I hope this pans out to be effective, it would be a way to improve air quality without adding more noise to the space. Edit: The article's claim is that because far UV is absorbed in the upper atmosphere there's not really any evolutionary pressure for organisms to develop protection. Larger organisms just happen to be protected by virtue of our size.