"Since the 1997 international accord to fight global warming, climate change has worsened and accelerated -- beyond some of the grimmest of warnings made back then. As the world has talked for a dozen years about what to do next, new ship passages opened through the once frozen summer sea ice of the Arctic. In Greenland and Antarctica, ice sheets have lost trillions of tons of ice. Mountain glaciers in Europe, South America, Asia and Africa are shrinking faster than before."

"Hackers broke into the electronic files of one of the world's foremost climate research centers this week and posted an array of e-mails in which prominent scientists engaged in a blunt discussion of global warming research and disparaged climate-change skeptics."

"The Earth’s oceans, which have absorbed carbon dioxide from fuel emissions since the dawn of the industrial era, have recently grown less efficient at sopping it up, new research suggests."

"Japanese whaling ships left port Thursday for Antarctic waters for their annual hunt of the ocean giants, Greenpeace said, setting the stage for high-seas confrontations with anti-whaling activists."

"The United States and China have agreed to cooperate on developing an inventory of China's greenhouse gas emissions, the Environmental Protection Agency announced Wednesday, an initiative that appears be a response to criticism of Beijing's data collection."

"Appearing with President Hu Jintao, President Obama on Tuesday told reporters that the United States was determined to work with China and other countries to help produce a substantive agreement in Copenhagen climate talks next month."

The peatlands of Indonesia, formed over thousands of years, used to be a vast reservoir of carbon. But now deforestation has dried them out, and they are burning, releasing back into the atmosphere as much carbon dioxide as all the cars and trucks in the U.S. The question is how economic incentives to save the peatlands can outweigh the incentives for destroying them.

"An African has taken over as director of Greenpeace, bringing experience honed as a teenage opponent of white rule in South Africa and a network of powerful contacts to the battle against global warming."

"COPENHAGEN -- Environment ministers made progress on Tuesday toward a scaled-down climate deal in Copenhagen next month, with Washington facing pressure to promise deep cuts by 2020 in greenhouse gas emissions."

As U.S. chlorine plants convert to cleaner technology, they are leaving behind large stocks of mercury. There is a danger that mercury will find its way to dangerous and polluting uses on the global market. Efforts to ban mercury export have not been effective.