"In the long term, the Earth's temperature may be 30-50% more sensitive to atmospheric carbon dioxide than has previously been estimated, reports a new study published in Nature Geoscience this week."

"The largest and most important U.N. climate change conference in history opened Monday, with organizers warning diplomats from 192 nations that this could be the best, last chance for a deal to protect the world from calamitous global warming."

"Germany's top climate researcher says he hopes he and his fellow scientists around the world have got it all wrong about global warming. Hans Joachim Schellnhuber, head of the Potsdam Institute for Climate Impact Research, told Reuters he gets no pleasure at all in being a prophet of doom and hopes he and his colleagues have overlooked effects that could still arrest climate change."

"The heads of the world's largest international financial institutions today called for a comprehensive agreement to combat climate change at this month's United Nations conference in Copenhagen and agreed to further coordinate their own efforts to help achieve the meeting's ambitious goals."

"Two environmental groups petitioned U.S. EPA today to set national limits for greenhouse gases using the Clean Air Act."

Sandstorms reminiscent of the 1930s dustbowl are becoming more common in Navajo country -- and climate change seems to be a culprit.

"The release of toxics once bound within glaciers may be a little-anticipated consequence of climate change. Adverse effects are likely occurring, or could occur, on almost every continent."

"If the evidence is overwhelming that man-made climate change is already upon us and set to wreak planetary havoc, why do so many people refuse to believe it?" Psychologists say denial of reality is a common human reaction to unpleasant truth.

"Most world leaders plan to attend a climate summit in Copenhagen this month, boosting chances that a new U.N. deal to fight climate change will be reached, host Denmark said on Tuesday."

"A group of U.S. senators who could determine the fate of a climate bill received more than $20 million in campaign contributions over the past two decades from energy interests with a direct stake in pending legislation."

"Climate change dominated the meeting of Commonwealth heads of government that concluded Sunday in Port of Spain with a statement of support for an international legally binding agreement in Copenhagen next month."

"President Obama today unveiled key details of the U.S. negotiation position headed into next month's global warming talks in Copenhagen, including a provisional greenhouse gas emissions target for 2020 "in the range of 17 percent below 2005 levels" and a new itinerary that includes a personal appearance during the opening days of the U.N. conference."

"Aggressively reducing emissions of non-CO2 climate drivers could forestall abrupt climate change for up to 40 years, according to a recent study in the Proceedings of the National Academy of Sciences. Without such efforts, even drastic cuts to CO2 emissions will fail to put the brakes on planetary warming soon enough to avoid climate tipping points, the authors warn."

"The University of East Anglia said yesterday that it was cooperating with police and launching its own internal probe into how thousands of e-mails and documents from its Climatic Research Unit ended up on the Internet last week, sparking an ongoing fight between climate scientists and skeptics who say the data breach suggests ethical lapses in the research community."

"President Barack Obama and Prime Minister Dr. Manmohan Singh today reaffirmed the global strategic partnership between the United States and India and launched a new and greener phase in their relationship. Recognizing that energy security, food security, climate change are interlinked, and that eliminating poverty and ensuring sustainable development and a clean energy future are among the foremost global objectives, the two leaders agreed to enter into a Green Partnership to address these global challenges."