Hiroshi Minami, Japanese delegation's chief negotiator, speaks during a press conference at the 2013 UN Climate Change Conference in Warsaw, Poland, on Nov. 20, 2013. Head of the Chinese delegation to the United Nations Climate Change Conference on Wednesday urged developed countries to fulfill their funding pledges for fighting climate change.(Xinhua/Zhang Fan)

Head of Chinese delegation Xie Zhenhua (1st L) speaks as deputy chief of the Chinese delegation Su Wei (2nd R) hosts during the high-level segment of 2013 UN Climate Change Conference in Warsaw, Poland, on Nov. 20, 2013. Head of the Chinese delegation to the United Nations climate change conference on Wednesday urged developed countries to fulfill their funding pledges for fighting climate change. (Xinhua/Zhang Fan)

Head of Chinese delegation Xie Zhenhua speaks during the high-level segment of 2013 UN Climate Change Conference in Warsaw, Poland, on Nov. 20, 2013. Head of the Chinese delegation to the United Nations climate change conference on Wednesday urged developed countries to fulfill their funding pledges for fighting climate change. (Xinhua/Zhang Fan)