From The New York Times:
While Bono tries to change the world by hobnobbing with politicians and Sir Bob Geldof plays host to his mega-benefit concerts, Willie Nelson has birthed his own brand of alternative fuel. It is called, fittingly enough, BioWillie. And in BioWillie, Mr. Nelson, 72, has blended two of his biggest concerns: his love of family farmers and disdain for the Iraq war.
BioWillie is a type of biodiesel, a fuel that can be made from any number of crops and run in a normal diesel engine. If it sounds like a joke, a number of businesses, as well as city and state and county governments, have been switching their transportation fleets to biodiesel blends over the last year. The rationale is that it is a domestic fuel that can provide profit to farmers and that it will help the environment, though environmentalists are not universally enthusiastic about it.