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After Pacific Gas & Electric, the giant California utility, began installing smart meters in the state's Central Valley, the company was swamped with complaints from residents that their utility bills had spiked. But an independent review of the smart meters released Thursday found that the devices were functioning properly and attributed the high charges to a heat wave last year that coincided with their installation as well as poor customer service by P.G.&.E.

The head of the review of the Intergovernmental Panel on Climate Change weighs in on the panel's leadership and flaws in its treatment of uncertainty.

Tibet's high-altitude meadows disappear as global warming and overgrazing accelerate desertification. "Once the grasslands are destroyed, they rarely come back," a Chinese official says.

The official who led China's delegation in recent climate negotiations says the right to a better life in poor countries trumps the responsibility to cut emissions.

A mountain lion wandered into the uniquely tolerant town of Berkeley, Calif., on Tuesday, and was ultimately shot by police. Heated debate has ensued.

Bill Gates adds detail to his call for a research push to expand energy choices without overheating the planet.

Exploratory drilling by a Scottish oil firm was halted after four Greenpeace protesters scaled the rig and suspended tents from its underside.

Learning which water sources villagers use and how far they carry heavy jerrycans of water is itself thirsty work in the Rwandan heat.

A tongue-in-cheek commercial from an anti-pollution group delivers a message about what the city’s pollution could portend.

An anatomy of the oil giant's media response to the Gulf disaster.

Exelon, which recently backed away from building new nuclear plants, announced that it was buying John Deere Renewables.

Homeowners who participated in a program that let them repay the cost of solar panels and other energy improvements through an annual surcharge on their property taxes must pay off the loans before they can refinance their mortgages, two government-chartered mortgage companies said Tuesday

Bjorn Lomborg's latest book is unlikely to bolster his popularity among those opposed to drastic immediate action to curb greenhouse gas emissions.

Politicians in Britain and Bulgaria are seeking ways to make nuclear energy affordable.

Both sides in the mountaintop removal mining debate are hardening their positions, taking their cases to Washington -- and to the courts.

Can personal passions can be reconciled with professional detachment? A reporter answers yes.

The federal agency that regulates offshore drilling is taking steps to end a long history of conflicts of interest and excessive coziness with the companies it is charged with policing.

The Environmental Protection Agency on Friday said it does not have the legal authority to ban lead bullets.

A judge ruled that the state attorney general failed to make his fraud case against Michael E. Mann but could try again.

The European Union's biofuels targets are driving a massive "land grab" in Africa, a conservation group claims.

The Nuclear Regulatory Commission proposes a fine against an unlikely violator: a coal plant.

The scientists involved in crafting the panel’s climate reports need to be more open to alternative views and more transparent, an independent review said.

Biking is booming in New York City, with the number of daily cyclists rising to an average of 236,000 in 2009, up 26 percent from 2008, according to statistics compiled by Transportation Alternatives, a pro-biking nonprofit group.

Native Canadians living downstream from oil sands mines of Alberta province have long complained that their high cancer rates were related to the expanding excavation of bitumen for the production of synthetic crude. Their claims have been disputed by the reports of a joint oil industry-government research panel that found that natural causes and not mining were responsible for the high levels of various metals in the sub-Arctic Athabasca River. But now a new study published in the Proceedings of the National Academy of Sciences is backing the position of the Native Canadians. Led by several University of Alberta researchers, the study found that unusual levels of lead, mercury, zinc, cadmium and other toxic pollutants were found near oil sands mining sites or downstream from them. The levels exceeded federal and provincial government guidelines.

The world's leading scientific academies prepare to deliver their critique of the Intergovernmental Panel on Climate Change.

Opponents of offsetting have likened the system to the kind of financial engineering on Wall Street that helped precipitate the recent banking crisis.

No one person or company has been implicated. Instead, several missteps and oversights by the crew are being explored by federal investigators as possible triggers of the emergency.

Federal researchers find evidence that global warming may be shifting big, consequential Pacific Ocean temperature patterns.

Final approval nears for the construction of the largest solar power plant in the world: the 1,000 megawatt solar thermal plant would be built on 7,000 acres in southeastern California.

Climate activists use Super Glue to attach themselves to Royal Bank of Scotland property, in a protest of the bank's investments in coal and oil development.