Warmist Michael Mann suggests that "plentiful and efficient renewable energy sources like wind and solar energy...could provide 70% of our energy needs in the U.S. in less than two decades"

What Does A Climate Scientist Think Of Glenn Beck's Environmental-Conspiracy Novel? | Popular Science

We are forced to accept, without explanation, how decades into the future no effort has been made to take advantage of far more plentiful and efficient renewable energy sources like wind and solar energy (which, by some estimates, could provide 70% of our energy needs in the U.S. in less than two decades).