Biodiesel is a clean-burning alternative fuel made from animal fat or vegetable oil -- anything from

Biodiesel is a clean-burning alternative fuel made from animal fat or vegetable oil -- anything from used restaurant grease to virgin soybean oil.
Nationwide, sales of biodiesel have soared from about 500,000 gallons in 1999 to an estimated 15 million gallons last year, said Joe Jobe, executive director of the National Biodiesel Board in Jefferson City, Mo.