Fuel cells have captured worldwide attention as a clean power source for electric vehicles (EVs). EVs powered by fuel cells are being developed by many auto manufacturers, and have generated interest and enthusiasm among industry, environmentalists and consumers.

A fuel cell EV, powered by an electric motor, promises the air quality benefits of a battery-powered EV, combined with the driving range and convenience of a conventional gasoline engine. Compared to conventional vehicles, fuel cell EVs can offer:

• zero or near-zero smog-forming emissions,
• reduced water pollution from oil leaks,
• lower greenhouse gas emissions (CO2),
• higher fuel economy,
• greater engine efficiency and
• much quieter and smoother operation.

A fuel cell using pure hydrogen produces no pollution. However, the production of hydrogen gas for use in fuel cells is expected to result in extremely low air pollution emissions. If alternative fuels are used as a source for hydrogen, fuel cell EVs will also encourage greater energy diversity.