at this time. Do you realize just how many windmills would have to be built to power electrical grids nationwide? Or how many solar panels? There wouldn't be any room left for growing anything.
I live where the windmills fill the valley west of me. They are all over the place and more and more are added all the time and they still don't produce all that much juice.
As for Obama saying it'll get down in 10 years, Nixon said the same thing 35 years ago.