Researchers at Edinburgh Napier University in Scotland have found a way to produce biofuel using the two main byproducts of the whiskey distillation process, reports the Guardian's Kirsty Scott. Taking the "pot ale" — the liquid from the copper stills — and the "draff" — spent grains — the researchers used an old fermentation method first developed to produce butanol and acetone, Scott says, and were able to produce biobutanol, which gives 30 percent more power than bioethanol.