D2O piles could produce the power to make hydrogen.

It has been used in research for making hydrogen.

It is also the most common way to make pure hydrogen, used in fuel cells.

Do basic work on the many steps involved in making hydrogen a climate-friendly fuel.

There is enough pressure at the core of some gas giants to make hydrogen a solid.

Oxygen was the gas Purple threw away when he made hydrogen from water.

Hot air's all right, but I think I can figure a way to make hydrogen for the next one.

To make hydrogen, all they need is water and en- ergy.

But most analysts have since concluded that they were used to make hydrogen for military weather balloons.

They needed power to recharge the Skeeters, for the vehicles, to make hydrogen.