A worker displays the castor-oil plant at the Brasil Ecodiesel factory in Iraguara, northeast Brazil, March 31, 2008. Biodiesel is a biofuel produced from oleaginous plants such as castor, soy and sunflower or animal fat. In Brazil, the inclusion of bio-fuels as an energy source was established by the law in 2005. Twenty-five percent of ethanol, extracted from sugarcane, is added to gasoline. Bio-diesel will make up 2 percent of diesel in Brazil in 2008, a proportion that will rise to 5 percent in 2010, saving the country 870870 million U.S. dollars per year, the government said.