Elisabeth Rosenthal writes about the United States and renewable energy for The New York Times:

As renewable energy gets cheaper and machines and buildings become more energy efficient, a number of countries that two decades ago ran on a fuel mix much like America’s are successfully dialing down their fossil fuel habits. Thirteen countries got more than 30 percent of their electricity from renewable energy in 2011, according to the Paris-based International Energy Agency, and many are aiming still higher.

The piece asks “Could we? Should we?”  Seems like the resounding answer to both is “Yes.”