Fuel cell automobiles are an attractive advance from battery-powered cars. They offer the advantages of battery-powered vehicles but can also be refueled quickly and could go longer between refuelings.
Fuel cells utilizing hydrogen as a fuel would be zero emission vehicles, and those using other fuels would produce near-zero emissions. They are also more efficient than "grid"-powered battery vehicles. In addition, fuel cell cars could produce fewer "system-wide" releases of greenhouse gases -- taking into account all emissions associated with resource recovery, fuel processing and use.
Studies by General Motors and Ford noted that fuel cell car engines could be built for about the same price as an internal combustion engine.