Sean Gallup/Getty Images
Activists dressed as (from L to R) leaders Abdoyale Wade of Senegal, Barack Obama of the USA, Angela Merkel of Germany and Hu Jintao of China pretend to debate in a giant aquarium filling with water on December 5, 2009 in Berlin, Germany.
A non-binding agreement on climate change has been reached by world leaders in Copenhagen. Will it have lasting effects on global warming? What does the agreement say about the relationship between the United States and China? Was anything actually accomplished at Copenhagen?
Michele Chan, spokeswoman for environmental group Friends of the Earth
David Hawkins, Director of the Climate Center for Natural Resources Defense Council
Kenneth Green, Resident Scholar at American Enterprise Institute and Adjunct Scholar for the Reason Foundation