The advantages of fuel cell cars?

The advantages of fuel cell cars?
Running costs will be lower than a petrol-powered car, because a fuel cell converts more than twice as much of the energy in the tank into motion at the wheels. The fuel cost per mile (before tax) is halved with a fuel cell car.

Kia is also convinced that oil prices will rise while the cost of hydrogen will fall, and this will further increase the financial benefit of fuel cell cars over those powered directly by fossil fuels.