That first one is pretty funny, but perhaps we can assume the writers have enough science to realise the energy levels issue. They may have omitted to say it,

That first one is pretty funny, but perhaps we can assume the writers have enough science to realise the energy levels issue. They may have omitted to say it, but I can imagine a fission power plant splitting water into H and O, which would be useful for a portable fuel source for flights, orbital launches, heating of suits and batteries, jetpacks, etc.