Whisky has grown popular around the world in the last 10 years. New distilleries are opening, and old distilleries are trying to produce more whisky. But as people make more whisky, they are also making more whisky waste huge amounts of leftover grain and liquid. Distillers do not have many options for what to do with this material. Some give it away to farms to feed animals. Others pay over $300,000 per year to dispose of it. And now, a company in Edinburgh, Scotland called Celtic Renewables is trying to make fuel with it.