I wrote on Boing Boing about the physics professor who became Uruguay's energy secretary, and within five years had the country on 98% renewable energy.
NOT ONLY CAN IT BE DONE, IT WAS AN ECONOMIC BOON THE THE COUNTRY.

This physics professor transformed his country to 98% renewable energy in five years
Ramón Méndez Galain was a Urguayan theoretical physics professor studying the Big Bang when the president of Uruguay shocked him with a phone call in 2008 asking him to be the country's energy secretary.