Vegetable-oil Fuel For Some Agriculture Dept. Vehicles

"[A]s supplies become available and if the costs are reasonable, USDA would try to start using a vegetable oil-based biodiesel fuel in about 800 vehicles, including some boats. Some of the vehicles are based in U.S. national forests... Biodiesel fuel is produced from soybean oil or recycled vegetable oil from restaurants. While its use doesn't cut down on smog-causing nitrogen oxide, it produces none of the carbon monoxide or small particles created by burning traditional petroleum-based diesel fuel. Fuel economy is slightly lower with biodiesel."