A biofuel can be liquid , solid or gas . It can power cars and other vehicles.
Most biofuels are at least as energy dense as
Biodiesel is not toxic or flammable and is biodegradable . Biodiesel has the highest energybalance of any fuel. 3.2 units of energy are gained for every unit of fossil energy needed to produce biodiesel.
Rudolf Diesel , inventor of the diesel engine , initially designed it to run on vegetable oil.
Henry Ford originally designed the Model T to run on ethan o l .