Alternatives fuels are vehicle fuels that are not made from petroleum
Alternative Fuels range from electricity to nuclear, but can be classified as any fuel which is "clean," or meaning that it does not produce CO 2.
hydroelectricity
its when it becomes hard to find, thus more expensive and scarce. As for alternatives its Hyrogen. And that's it. Forget about bio fuels as we (the people of the world) need the space, crops and...
methanol compressed natural gas
To what?? Try and put some propane in your car's petrol tank and you might find your answer for that case.