Inventors such as Henry Ford's car, and Rudolf diesel in the late 1800 and early 1900 era that the engine of the vehicle they will use fuel that is derived from a plant, where the oil is cheap and popular. At present, there is an increase in the price of oil and the growing ecological awareness of bio-fuel is more in need of the people. So look for bio-fuel made from plants and vegetable oil, and other things.
Therefore, they are renewable energy sources to reduce global warming, such as biodiesel. Biodiesel is a fuel made from vegetable oils, animal fats, and materials such as scrap and ethanol, or grain alcohol called produced from grains such as corn or flour from sugarcane.