IPCC report warns of urgent need to act on global warming.

The Nobel Prize-winning Intergovernmental Panel on Climate Change yesterday issued “their starkest warning yet on global warming.” The report notably said that evidence of the planet’s warming was now “unequivocal” and the effects on the climate system could be “abrupt or irreversible.” Dr. Rajendra Pachauri, head of the IPCC, said, “What we do in the next two to three years will determine our future.”

UPDATE: Yesterday, presidential candidates John Edwards, Hillary Clinton, and Dennis Kucinich attended a forum on global warming. Heading Left, MyDD, D-Day, Daily Kos’ hekebelos, and Calitics liveblogged the event.