Parallel thread in "Questions".
I suspect this question pops up with some regularity.
Re Hydrogen: It is not a natural fuel here on Earth. It must be manufactured; the BTU's you feed into its synthesis are recovered when it's burned (minus some process losses).
Re "nuculer": 2-3 guys in my lunch bunch began their careers on the ANP program. They warn the rest of us not to get too close...