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Whenever electricity is required, you can use fuel cells. The size of fuel cells is scalable. Fuel cells can therefore be created small to power an MP3 player or even large enough to give a town its needed electrical power. Aside from providing electrical power to certain things, it can also supply the needed rotary power by cars. At present, car manufacturers worldwide are looking at hydrogen fuel cells are an alternative to the combustion engines. There are already pictures of hydrogen powered vehicles online; if you want, you can check them out if you have the time. If ever the hydrogen powered vehicles will become a reality in the near future, the dependency of many countries to petroleum will be reduced and not only that, pollution will be cut down.

http://www.alternativefuelstips.com