The two week international climate summit ends tomorrow with the very real possibility that no agreement will have been reached by world leaders, scientists and policy makers. It’s been rough going.

Angry protestors banged at the doors of the Bella Center, and tensions over who should foot the bill for reducing greenhouse gases erupted when developing nations walked out of the talks.

The press awaits a grand speech when President Obama swoops in tomorrow, but wonder if he can make good on any promises with so much opposition at home. Scientific American editor David Biello joins us now from the Copenhagen Island Hotel for an update.

David Biello in Scientific American: Lonely senator says Copenhagen necessary for climate action in U.S.

Mother Jones: Deal-Or-No-Deal Time in Copenhagen

Word of Mouth: Denmark Leads The Way To Clean Energy

(Photo courtesy Andy Revkin via Flickr/Creative Commons)