CNN.com crew to drive from California to Georgia on biodiesel fuel . Biodiesel fuel is made from chemically modified vegetable oil . The process of making it involves heating the plant material, then adding a catalyst that breaks down the oils into simpler molecules and produces electricity as an alternative source for transportation fuels. Biodiesel fuel , however , is not always cheaper than gasoline -- although it is made using renewable resources , such as vegetable oil or used cooking oil . Crew to offer green road trip tips ; vote on possible destinations here .
CNN.com crew to drive from California to Georgia on biodiesel fuel . Biodiesel fuel is made from chemically modified vegetable oil . The process of making it involves heating the plant material, then adding a catalyst that breaks down the oils into simpler molecules and produces electricity as an alternative source for transportation fuels. Crew to offer green road trip tips ; vote on possible destinations here .