Is There a Diminishing Return on the Investment?

"It's just so hard to believe that by the time the things we're talking about happening happen, that we will have come up with some crazy technological advancements," he says. "To get to the point that you're talking about simply requires more resources than capital than we have available." The U.S. is still at only like 11 or 12% of all of our energy use being renewables.