The ONLY way to get the sheer quantity of power needed to do this on an industrial scale, is through traditional means. Meaning coal, oil, NG, or (best option,) nuclear. The touchy-feely methods are just not practically availible on that sort of scale.

Of course, the same green-weenies whining about a lack of clean energy are the ones who've made the US unable to construct new reactors for the better part of 30 years.

 

I don't know the energy requirements or any of that stuff. But I was bringing up options.

 

Not a flame at all. Id LOVE to see a nuclear-based hydrogen cracking industry. It'd be an awesome step towards energy independence, but theres no way for it to happen without significant regulatory reform.