NOBODY has suggested, even for a second, that electrolyzing water should be used as a method for generating hydrogen as a fuel. I don't know why this is, but, so far, they want to use either petroleum or natural gas.

The problem of course, is that the energy needed to do all that has to come from somewhere. Frankly, I think it's an efficiency problem. Solar electricity generation from photovoltaics or from wind, seems to be unable to manage the problem.

It's just like the complaint that ethanol production from corn (maize) uses more energy, overall, than is produced by the resulting fuel.

Likewise, production of biodiesel, not the government-sanctioned 15% bio + 85% petro mix, but "real" biodiesel has not caught on significantly, despite the much lower production cost. It's popular in parts of the country where people own lots of boats, since they run them on the biodiesel once they replace all the seals and gaskets.

RE