Pretty sure he's not advocating actually making a mile square cube of battery. He's just illustrating the scale of the problem. It's the same amount of battery no matter how you divide it up.
Efficiency is definitely some low-hanging fruit. It only gets us so far, though. Rooftops are probably the most effective place to deploy solar, but housing is only one piece of the puzzle.
Efficiency is definitely some low-hanging fruit. It only gets us so far, though. Rooftops are probably the most effective place to deploy solar, but housing is only one piece of the puzzle.