The vast $320 million desalination plant approved this week by San Diego

The Obama administration stepped up efforts to reverse a rule adopted late in the Bush administration that makes it easier for companies to deposit debris from mountaintop coal mining near streams. Interior Secretary Ken Salazar, left, said that the rule was legally flawed and that he had asked government lawyers to press a federal court to vacate it and send it back for reworking.

Chatting with a visitor about energy issues in the back of the Greater Mount Carmel Baptist Church here, a group of women exploded in laughter at the idea that their electric rates were among the lowest in the nation.

One of the 21 coal-fired power plants in Missouri that emit more than 75 million tons of carbon dioxide annually and generate 80 percent of the state

The polar bear, whose Arctic hunting grounds have been greatly reduced by a warming climate, will be placed under the protection of the Endangered Species Act, Interior Secretary Dirk Kempthorne announced Wednesday.

SUNNYVALE, California: Call it an eco-parable: one Prius-driving couple takes pride in their eight redwoods, the first of them planted over a decade ago. Their electric-car-driving neighbors take pride in their rooftop solar panels, installed five years after the first trees were planted.

The definition of renewable energy seems clear cut: The sun continues to shine, so solar energy is renewable. The wind continues to blow, so wind turbines churn out renewable power.

Estimating that televisions and their electronic accessories account for 10 percent of the electricity used in an average household, California

It seemed like a symbolic tipping point for the nation in August when, in the midst of record high gasoline prices and a presidential campaign, the Santa Barbara County Board of Supervisors abandoned its longtime opposition to offshore oil drilling.

With offshore oil drilling platforms in the distance, children played in the surf early this year in Santa Barbara County, Calif.

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