Distilled alcohol from grain is called ethanol. The word in modern usage usually refers toethanol fueloror biofuel made by distilling corn. Regular gasoline powered cars can run on gas blended with up to 10% ethanol. Corn is a renewable resource, so biofuels are seen as a replacement for fossil fuels. However, the growing use of corn for biofuel raises concerns about theordiminishing availability of corn for food. Also, the production of biofuels usesoras much or more energy than it produces.