The use of hydrogen as an energy source, particularlyin automobiles, can help to resolve several environmentaland energy issues. The number of automobiles ownedincreased from 391.1 million to 676.2 million in just 14years (1980-1996) [1]. The use of gasoline or diesel inautomobiles results in release of a number of harmfulgases including NOx, CO, and CO2. For example, averageannual increase of CO2 emission over the past decade hasbeen 1.3 per cent or nearly 300 million tonnes a year.Hydrogen operated automobiles releases only water(H2O) into the atmosphere. Therefore, the use ofhydrogen (when combined with production from nuclearreactors) creates the opportunity to have not just “lowemissionvehicles” but zero-emission vehicles. Inautomobiles, hydrogen may be used in two ways; fuelcells or a direct hydrogen combustion engine. However inboth cases onboard storage of hydrogen is necessary.
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