I saw this mentioned a while ago, but what I don’t entirely understand is what the fuss is about.
High school chemistry calculations tell you that if you want to recombine the hydrogen and oxygen from the salt water, it’s going to cost you a good bit of energy, and the Second Law of Thermodynamics tells you that you’ll never get out of a system the same energy that you put into it. Plus, they appear to be using radio waves, which are not entirely focusable (I think).
What am I missing here? Oil, coal, and nuclear radiation are good energy sources precisely because nature has already put in the energy to bring them up to a higher potential energy, which we can then release. Why should we deal with one of the most stable substances on earth, bring it up to a high PE, and then bring it back down? How can that be profitable?