China defends role played by Premier Wen Jiabao after a barrage of international criticism

President Obama says disappointment was justified, hardening widespread verdict that conference had been a failure

E.U. calls on the U.S. to play a bigger role in combating climate change

Britain accuses China and others on Monday of holding the world to ransom

Key company executives have expressed optimism in spite of a nonbinding Copenhagen Accord

China praises the outcome of the Copenhagen climate summit despite global criticism

Delegates "noted" an accord struck by the United States, China and other emerging powers

P.M. Stephen Harper brushes off criticism Canada would act on climate change only with U.S.

Climate talks fall into crisis after developing nations rejected plan worked out by President Obama

President Barack Obama reaches agreement with major developing powers on a climate deal

But failure of China and U.S. to give new proposals blocked chances of ambitious deal

President Obama urges world leaders to "act together" but did not offer new U.S. commitments

Ban Ki-moon remains optimistic new agreement will be reached as Copenhagen conference nears end