Chinese Premier Wen Jiabao left Beijing for the climate summit in Copenhagen, Denmark on Dec. 16, when pessimism and disappointment were simmering among negotiators, who, after about 10 days' bargaining, found a bridge to span their rift seemed a mission impossible. Full story

The 15th United Nations Climate Change Conference (COP15) will take place at Bella Center in Copenhagen from the 7th to the 18th of December, 2009.