Hydrogen fuel is used to power vehicles in much the same manner as tradition internal combustion engine powered cars. Additionally, hydrogen produces nearly three times the energy per pound; however, it has only about 1/10 the density in a liquid form. Therefore, a hydrogen fuel talk has to be much larger than a traditional gasoline tank.

In order to use hydrogen in a car, it has to be produced as it does not occur naturally in a quantity worth using. There are several methods for producing hydrogen including pulling the hydrogen out of water. The process to create hydrogen Unfortunately, this process required a good deal of energy. A recent study completed at MIT found that "Even with aggressive research, the hydrogen fuel-cell vehicle will not be better than the diesel hybrid ( a vehicle powered by a conventional engine supplemented by an electric motor) in terms of total energy use and greenhouse gas emissions by 2020."