Quote Originally Posted by Rainfall
Wind, water, solar, geothermal. Enough to replace coal many times over. The planet get's more energy from the sun in a couple of hours, than is produced by burning fossils in a year.
That's right. But you know that the investment to do it would be astronomical. There are also technical and political obstacles. The produced energy would not be there at the time and place where it is needed. To effectively use it you would need a worldwide grid to get the energy to the place where it is needed at the moment. That would include production and transit in politically instable regions.