Many people already run their trucks and cars on Biodiesel. Vegetable Oil is less toxic than Ethanol. Mileage, embodied energy, and other factors score better than any other fuel that is commonly & currently available at pumps. Climate is a factor since Diesel doesnt do well in the cold.
Both Ethanol and Vegetable Oil can be grown from plants organically if the people can continue to demand these changes to Corporate and Governmental policy & production!!