Power hungry? Maybe there’s a better way

You flip on your computer. You flick off the lights in your room. You eat in a dining hall or other eatery that is alternately heated or air-conditioned, where there are also lights and stoves on. They are all powered by energy of some kind. We take all this electric power for granted; we hardly ever, if ever, think about what it would be like to live without it.

So what

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