People are... completely out of touch with the scale of our industrial infrastructure. Cities us 3% of the Earth's land surface. Fossil fuels inject power into

People are... completely out of touch with the scale of our industrial infrastructure. Cities us 3% of the Earth's land surface. Fossil fuels inject power into earth at a rate 3x the tides. We intercept about 30% of the total power generation we could get from rainfall. On the topic of energy storage, for the USA you'd need a lower reservoir approximately the size of Lake Erie, and a flow rate 150x that of Niagara Falls. http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-storage/ http://physics.ucsd.edu/do-the-math/2011/11/pump-up-the-stor... I'm not saying it can't be done -- energy storage at this scale has to be done for a switch to renewables -- I'm saying that the scale is absolutely immense.