Energy is cheap; people are expensive.  One kilowatt hour costs about ~80 seconds of a human&#x27;s time, if the kwh and the human are both in Chicago and the human gets federal minimum wage and costs nothing in overhead.<p>(Any human fitting this definition is also spherical and frictionless, i.e., existing nowhere outside of physics textbooks.)<p>Bonus points: this <i>remains true</i> if one does not value money but one instead counts costs totally in carbon credits, which is one of those things that the environmental movement passionately believes and yet doesn&#x27;t spend much time thinking of the implications of.