China on Friday attacked a top U.S. envoy as either “extremely irresponsible” or lacking in common sense, for saying at a global summit to tackle warming that no U.S. climate aid would go to China.

Vice Foreign Minister He Yafei also said that developed countries would need to offer more than short-term financing at Dec 7-18 talks in Copenhagen, if they wanted poorer nations to sign up for a long-term emissions-cutting goal.

Todd Stern, President Barack Obama’s special envoy for climate change said earlier this week, that he could not “envision” public funds going to China.

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