Renewable Portfolio Standard

A University of Minnesota study published in PNAS looks at alternatives including ethanol and electricity and determined that "it's hard to beat gasoline." Even electric vehicles can do better or worse depending on how utilities source electricity.
Dec 17, 2014   AP via ABC News
No form of energy production comes without controversy, including solar, despite it being renewable. In advance of the world's largest solar thermal plant opening in Calif's Mojave Desert, KQED's Lauren Sommer shows both sides of the green debate.
Jul 17, 2013   KQED Science
As renewables replace polluting, carbon-intensive power sources, the reliability of the nation's electricity will be impaired because of the inability of the grid to accommodate power produced from distant sources, according to a new report.
Nov 11, 2008   The New York Times