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.

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.

"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."

Refugees from lands made uninhabitable by climate change -- expected in tens of millions -- may soon be threatening peace and security in many parts of the world. The UN is expected soon to address this issue.

"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."

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

"There are significant questions about the robustness of the numbers at the heart of the new report estimating more than 300,000 deaths are already being caused each year by global warming...."

"The most likely place for oil in the Arctic is off northern Alaska in the Chukchi Sea, the researchers report. But conservationists warn of drilling in the fragile environment."

A power plant under construction on a Finnish island was supposed to be the showpiece of a nuclear renaissance. But it is way behind schedule and over budget.

"China is ready to strengthen its cooperation with the United States to combat climate change, Premier Wen Jiabao told US House Speaker Nancy Pelosi on Wednesday, state media reported."

Scientists from the National Center for Atmospheric Research say melting Greenland ice sheets could raise sea levels more in the northeaster US and Maritime Canada because of a change in ocean currents.

"Global energy demand is expected to soar 44 percent over the next two decades with most of the demand coming from developing countries such as China and Russia, the U.S. government's top energy forecasting agency said on Wednesday."

The earth's species may be facing a sixth major mass extinction that could take millions of years to recover from, Elizabeth Kolbert reports in The New Yorker.

U.S. Congressional leaders visiting China think an understanding between the U.S. and China is key to reaching a climate pact in Copenhagen.

UN Secretary-General Ban Ki-moon told a meeting of business leaders in Copenhagen that "climate change is the defining challenge of our time."