"China and India formally agreed Tuesday to join the international climate change agreement reached in December in Copenhagen, the last two major economies to sign up."

"President Barack Obama made a renewed push for a long-stalled climate and energy bill Tuesday, urging lawmakers at a White House meeting to pass a comprehensive bill this year."

"One of the stickiest points in international climate change negotiations is how to account for carbon dioxide and other greenhouse gas emissions produced to make goods that are then sold for export."

"The European Union's development chief may be forced to name and shame France, Germany and Italy for not living up to their aid commitments, contributing to a roughly $17 billion funding gap this year."

The pace at which glaciers are melting in many places around the world from Asia to Alaska. An error in an estimate of Himalayan glacier melting in a 2007 UN report has been seized on by climate change deniers. But the evidence of widespread and rapid glacial melting is overwhelming.

As Congress has gridlocked on climate change, the Obama EPA has pushed forward to regulate greenhouse emissions under its Clean Air Act authority. Now some Congress members are proposing legislation to prevent EPA from doing that as well. The key question is how much support they can win from coal- and oil-state Democrats.

"Climate scientists have long warned that global warming could unlock vast stores of the greenhouse gas methane that are frozen into the Arctic permafrost, setting off potentially significant increases in global warming. Now researchers at the University of Alaska, Fairbanks, and elsewhere say this change is under way in a little-studied area under the sea, the East Siberian Arctic Shelf, west of the Bering Strait."