A hydrogen vehicle is an alternative fuel vehicle that uses hydrogen as its onboard fuel for motive power. The term may refer to a personal transportation vehicle, such as an automobile, or any other vehicle that uses hydrogen in a similar fashion, such as an aircraft. The power plants of such vehicles convert the chemical energy of hydrogen to mechanical energy either by burning hydrogen in an internal combustion engine, or by reacting hydrogen with oxygen in a fuel cell to run electric motors. Widespread use of hydrogen for fueling transportation is a key element of a proposed hydrogen economy.

The Answer Is The Cost Is 25000000 And that's the answer.

Powering vehicle's and powering buildings

the fuel cells convert hydrogen into energy using a converter and that energy is used to power the vehicle

Depends on the vehicle. As there are no hydrogen cars being sold as of now, it is impossible to list mileage.