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Drought is driving some people in the Navajo Nation to drink water that is contaminated with uranium and other contaminants.

'Electonic cigarettes, which offer a dose of vaporized nicotine to be inhaled from a tube that looks like a cigarette, may offer a less dangerous way for smokers to quit -- or stay addicted. But the mostly made-in-China devices are largely unstudied and unregulated.

"Canada's rules for cutting greenhouse gas emissions may not come into effect by 2010 as had been planned, Environment Minister Jim Prentice said Thursday."

The high-speed rail system in Spain is a huge success, and offers some lessons for Obama administration officials seeking to develop something similar in the U.S.

A company that collects used electronic equipment for "recycling" comes under fire from activists who say the waste is sent to developing countries and mishandled.

"A federal judge in Indianapolis has ordered Duke Energy Corp. to shut down nearly 40 percent of an Indiana power plant's capacity as part of an enforcement case that dates back to the Clinton administration."

"The increasing acidity of the world's oceans due to global warming must not be left off the agenda at the United Nations Copenhagen climate negotiations in December, 70 of the world's science academies warned today."

Delegates in Bonn negotiating a post-Kyoto climate treaty grudgingly accepted a first draft text as a starting point -- despite many reservations.

GM is saying that despite its bankruptcy the plug-in hybrid Volt still has the greenlight for a 2010 launch. But does it?

A proposed dam on the Similkameen River close to the border between Washington and British Columbia raises thorny trans-border water issues.