That's literally what he said, yes.
He did imply it would likely not be possible. He said that if it could be captured, it would be an absolutely mind-boggling ROI in terms of energy in vs energy out.
He did imply it would likely not be possible. He said that if it could be captured, it would be an absolutely mind-boggling ROI in terms of energy in vs energy out.
However, think of the sheer amount of potential energy cause by plate tectonics... we're talking about continents... moving.