Hydrogen

Hydrogen is produced from water through electrolysis, but it can also be processed from other hydrocarbon fuels and biomass sources. Hydrogen is an efficient energy source with high energy content that produces few emissions.

Though some automakers are testing hydrogen-burning cars, they are currently not feasible or economical. Possibly the greatest potential use for hydrogen as a transportation fuel is in fuel cells to generate electricity to power a vehicle. For more information on fuel cells see Unit 3, Section 3.