Penn State researchers developed a method that dramatically reduces the amount of water needed to flush a conventional toilet, which usually requires 6 liters (via Jan Kolar/Unsplash) Everyone knows that if it’s yellow, you should let it mellow. (But if it’s brown, please flush it down.) Cheeky children’s rhymes about toilet etiquette may be a thing of the past, though, […] The post High-Tech Toilet Coating Does the Dirty Work For You appeared first on Geek.com. Read more