The rapid growth of technological development and technical innovations attract more and more people to use vehicles. Nowadays vehicles are necessity rather than luxury. Therefore pollution due vehicle fuels has become one of the severest problems in big cities. Several alternative fuels have been developed for recent years.
Fuel cells are complicated appliances that generate electricity using hydrogen gas. This technology increases the efficiency of energy and uses less fuel, thus better economy, and produces fewer emissions thus cutting down on the production of pollutants like carbon dioxide, carbon monoxide, nitrogen oxides and hydrocarbons. The economic feasibility of this type of vehicles is obscured by the unavailability of free hydrogen and the difficulty in the storage and the distribution of the gas. Fuel cell powered vehicles are about twice as efficient as the internal combustion engines and thus are economically superior.
These cars are environmentally friendly and run nearly silent. The ‘fuel’ for electric cars costs a lot less per mile than it does for gasoline vehicles. The disadvantages of the electric car is that the batteries are heavy, they charge slowly, have a limited capacity thus limiting the range of the vehicle, are bulky, have a short life and are fairly expensive. These reasons have resulted to a frail consumer interest and this has related economic back draws.
Hydrogen gas as a fuel promises to eliminate all pollution problems created by the fossil fuels. This is a clean technology that only produces water as the by product. There are no environmental dangers like oil spills to worry about with hydrogen. In cases where the hydrogen gas is derived from the electrolysis of water, no green house gases are added to the environment due to the fact that there is a perfect cycle-with the electrolysis producing hydrogen from water and then the hydrogen recombining with oxygen to create water and power.
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