In the present day, almost vehicles use the combustion
engine to drive. This kind of engine needs the fuel made from
hydrocarbon compound or petroleum which is rapidly
decreased in the future. The incomplete combustion causes the
environmental pollution that affect to human. So many
scientists try to fmd the new kind of fuel which is lower effect
and has a lot of sources to produce. One of them is the electric
energy which is made by sunlight, heating, potential energy
and kinetic energy.