December 11, 2013 Once the Cold War ended, much of Russia's surplus uranium from thousands of decommissioned weapons wound up in crumbling military facilities. In 1993, the U.S. Department of Energy made a deal to have the material converted to fuel for U.S. power plants. The last shipment arrives today.
December 5, 2013 Shell's new vessel is so large that if you stood it up, it would be taller than the Empire State Building. It will be anchored 300 miles off the coast of Australia to handle liquefied natural gas.
December 5, 2013 Under the new plan, each federal agency would have until 2020 to get 20 percent of its power from renewable sources such as solar and 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.
November 25, 2013 Previous estimates of the climate-warming gas were based on the rough number of methane-emitting sources on the ground — such as factories, refineries, stoves, swamps, landfills and cattle herds. But by directly measuring levels of methane in the air instead, a new study puts the total much higher.
November 18, 2013 Workers at the Japanese nuclear plant begin a delicate yearlong operation to remove radioactive material from the first of several crippled reactors.