Refuelling will only take 10-15 minutes. If nitrogen is manufactured in large quantities it's operating cost could be competitive with petrol cars. These are fuels produced from crops or vegetation. Biofuels have the advantage that they are not fossil fuels. However a lot of energy is used in their production and there would be a need for large amounts of land to produce enough crop.
Ethanol is produced mainly from corn and is usually used as a fuel in conjunction with petrol.
These cars use a combination of a petrol or diesel engine and electric power. Batteries are used to drive an electric motor at lower speeds, such as with urban stop-start driving, and the engine is used for higher speeds or when more acceleration is needed. The car also uses the batteries to automatically start-up or shut down so the engine does not idle. The batteries do not need to be recharged for long periods of time because of something called regenerative braking. The electric motor converts electricity into mechanical work to drive the wheels and can also act as a generator to convert forward momentum into energy to recharge the batteries as the car is forced to slow down during braking.