Energy sources to replace gasoline and diesel used in road transport there are several types of the following
(1) natural gas (CNG). Gas is considered a clean fuel. It reduces carbon dioxide emissions by about 50% but requires a large tank containing gas and worse.
(2) biofuels (Biofuels). Biofuels are an important ethanol and biodiesel for ethanol if it is used in high proportions. Must be adjusted to use the engine
(3) power. Power can replace oil in the 2 way. The first approach is to use both oil and electric hybrid car or hybrid car. The hybrid cars use both. Engine and electric motor.
The second approach is to use power only through the electric motor powered by batteries in the car. This power has long been used. Electric cars are older, but restrictions on driving distance from each electric charge. And the long recharge time. It also carried more weight at least. It must carry the heaviest battery. New electric vehicle with batteries that store energy using new technology has much greater. And problems of electric car gets older.
(4), hydrogen (H2). Features a hydrogen fuel is clean burning and has steam. But hydrogen does not exist in themselves. But as a natural substance with other compounds such as water (H2O), natural gas, methanol (CH3OH), etc. Therefore, if the hydrogen must be produced from compounds containing hydrogen is mixed.
To use hydrogen as fuel to produce electrical energy and mechanical energy. Fuel cells must be used. (Fuel Cell) (a new energy technology) from being a computer. And a fuel cell car is a machine from being called. Car Fuel Cell (Fuel Cell Vehicles).
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