Actually, no. How do you make hydrogen? Any energy involved?
Edit to add: The obvious short-term answer is nuclear. So obvious that even President Dumb-Ass is pushing it.
well yes energy is involved with "harvesting" hydrogen, considering your not making it your pulling it out of things it is inside of. Several of the ways to get it also just involve chemical reactions, or time to ferment. I know other ways they utilize electricity to extract it, but there are more than a few very green ways to get large amounts of it collected.
I agree nuclear is also a very good option being mostly unexplored minus a few.