H2...FungiJust because your circle does not know where the H2 will come from does not mean other circles do not have an answer.
Many ways to produce H2! Do a search on the United States Patent Office! How about Solar, Wind, Tidal for starters many ways to 'crack' other elements containing H2 to release it and 'produce'it.
How about old Stuart Energy? Pour water in out comes H2. You could have one right in your car I bet.
Forget thinking out of the box. Be one with the box. LMAO
Lots of answers if you ask questions.