Now, we know there was quite a lot of hydrogen fuel hidden away.
The problem was always, can you make hydrogen fuel at a price point that makes any sense to anybody.
That's because in Britain there's nowhere to fill up with hydrogen fuel.
Increase wind power 80 - fold and use that energy to make hydrogen fuel for cars.
This material may allow for hydrogen fuel to be more accessible to consumers.
One such effort is to explore means of producing hydrogen fuel from water.
The hydrogen fuel will be rolled out in two stages.
Another source for biological production of hydrogen fuel is algae.
Once hydrogen fuel becomes more popular, it will be less expensive than other fuels.
The main objection to liquid hydrogen fuel is its cost.