PG&E, a Northern California utility company, is already experimenting with using big batteries to store wind-generated electricity at its Vaca-Dixon Substation.
California hopes to get 33 percent of its electricity from wind and solar power by 2020. But that will only work if the state can economically store some of the energy for release on cloudy, windless days.
Each federal agency has until 2020 to get 20 percent of its power from sources such as solar, wind.
December 2, 2013 The U.S. aims to reduce carbon dioxide emissions by 80 percent by 2050. Wind and solar power can help. But folks doing the math say other pricey, controversial technologies — such as burying carbon gas underground, and expanding nuclear power — are also likely to be part of a low-carbon future.
November 30, 2013 Renewable energy has become a $220 billion a year industry. But to significantly slow climate change, the power of wind, solar and other renewable sources must vastly expand. Some say the tech breakthroughs needed are on the horizon, though a top economist sees a tougher road ahead.
November 26, 2013 KUNCVoters in three Colorado communities passed measures this month limiting the practice of hydraulic fracturing. A close vote in a fourth community means a recount next week. Companies say the measures are creating an uncertain business environment.