Yes absolutely, we're just exploiting potential energy here, and that was my point, perhaps I wasn't clear enough.
That's why the efficiency of the power plant (if this energy would have been captured) would have been a sight to see on paper. The energy they put into the fracking would have been tiny compared to this.
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.
That seems like it would be a feature, lots of free energy and no more earthquakes killing people, destroying infrastructure (which must cause massive amounts of pollution), etc.
That's why the efficiency of the power plant (if this energy would have been captured) would have been a sight to see on paper. The energy they put into the fracking would have been tiny compared to this.
edit: spelling