He still uses hydrogen as the working fluid, but stores it solid.

After our sun stops using hydrogen to make energy, it will use helium in its very hot core.

So they had to use hydrogen, one of the most explosive gases known.

Q. How will we use hydrogen in a motor vehicle?

Often, the cells use hydrogen to produce electricity, a relatively clean process.

The technology is already in place to operate a car using hydrogen.

And could you use hydrogen to run cars, for example?

During the project the researchers studied the efficiency of using hydrogen as a fuel source.

They use organic compounds or molecular hydrogen as the energy source.

We didn't, so they had to use highly flammable hydrogen.