"Exxon Mobil, the world’s largest publicly traded oil and gas producer, said Monday that it had agreed to buy XTO in an all-stock deal valued at $31 billion, the biggest oil and gas deal in four years."

"Millions of households across America are taking a first step into the world of the 'smart grid,' as their power companies install meters that can tell them how much electricity they are using hour by hour -- and sometimes, appliance by appliance. But not everyone is happy about it."

"The Department of the Interior will undertake an experimental initiative to improve the management of Glen Canyon Dam and the Colorado River as it flows through Grand Canyon National Park, Secretary of the Interior Ken Salazar announced Thursday during the Colorado River Water Users Association conference."

"Architects of Senate energy and climate legislation reiterated their support for nuclear power and offshore drilling yesterday in an effort to garner the support of moderate Democrats and Republicans."

"Mercury exposure in the United States increases with age, then starts tapering off when people turn 50, the Centers for Disease Control and Prevention found in a study released today."

"Global warming is now officially considered a threat to U.S. national security. For the first time, Pentagon planners in 2010 will include climate change among the security threats identified in the Quadrennial Defense Review, the Congress-mandated report that updates Pentagon priorities every four years."

"Nearly 130 scientists today asked the Interior Department to change a policy set under the Bush administration guiding how agencies decide whether a species is endangered."

"The Bureau of Reclamation wants to use an experimental biological pesticide to control invasive mussels that are interfering with dam and hydropower operations that supply electricity and drinking water to millions of people across the Southwest."

"Three Senators released a broadly-worded blueprint of a climate change and energy bill on Thursday afternoon that they believe can win the 60 votes needed to push the bill through next year."

"When President Barack Obama takes part in the high-level talks of the UN conference on climate change next week, his political opponents will be there too, showing the world why the President has had trouble making a stronger commitment to reduce greenhouse gas emissions."