This is true for the moment. I'd love for more science fiction stuff to get moving, like solar collectors in orbit and microwave beaming the power back to the

This is true for the moment. I'd love for more science fiction stuff to get moving, like solar collectors in orbit and microwave beaming the power back to the surface. (Of course any high concentration of power is inherently also abusable as a weapon...) We also have to worry about the addition of energy to the earth as an acceleration of global warming, which might be offset by making the top of all of our cities and roads reflective (often white, sometimes clear metal) instead.