"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."

Residents of Treece, Kansas, try to go forward as they wait for buyouts at a Superfund site created by years of lead and zinc mining.

"If taxpayers end up paying only 1 percent of the cost of cleaning up PCB contamination in the Fox River, that could be between $10 million and $15 million. If the taxpayer obligation reaches 10 percent, the figure becomes $100 million or more."

"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."

"Negotiations at the UN climate summit have been suspended after developing countries withdrew their co-operation."

"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."