What have world leaders accomplished at the U.N. climate change conference in Copenhagen?

The U.S. and China, along with India and South Africa, forged a climate deal in the 11th hour of the summit on Friday, according to media reports. Details of that accord are still developing, but many are already saying it's falling short of expectations. In other notable developments: Secretary of State Hillary Rodham Clinton pledged that the U.S. would contribute to a global fund of $100 billion to help poor nations' climate change efforts, and negotiators were close to a deal that would curb greenhouse gas emissions through forest preservation.

How do these achievements compare to expectations? Have negotiators done enough to advance international efforts to control emissions? Will Copenhagen affect U.S. efforts to pass domestic climate change legislation?

Editor's Note: The Copenhagen Insider blog closes, but discussion of these questions moves to our permanent experts forum for energy and environment.