Hydrogen cars promise clean, green driving – but several factors could stop their mainstream adoption.

Firstly, a quick explanation of hydrogen cars.

They are sometimes referred to as Fuel Cell Vehicles (FCV), and are cars powered exclusively by oxygen from the air and compressed hydrogen.

People tend to be amazed when they hear that hydrogen cars only emit water and heat from their tailpipes. And this is true – these cars emit no nasty pollutants whatsoever.