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.

"Federal officials must reconsider the irregular water releases from Glen Canyon Dam, which may harm the humpback chub, an endangered fish."

"Environmentalists feel betrayed by the EPA's decision not to block new mountaintop mining projects."

"Delegates from 174 countries and 230 nongovernment interest groups meet from Monday through June 12 in Bonn, Germany, in the second of five negotiating conferences to culminate with a final agreement being adopted in December in Copenhagen, Denmark."