U.N. Secretary-General Ban Ki-moon said Wednesday the world must agree on a new treaty to curb pollution at a crucial climate change meeting in Copenhagen in December and urged business leaders to join efforts against global warming. Ban, who has put climate change among his top priorities, said he would mobilize «every effort» to reach an agreement at the U.N. meeting to adopt an ambitious global treaty to replace the Kyoto protocol, which expires in 2012. «We must seal the deal in Copenhagen in December this year,» the U.N. chief told a group of Japanese business leaders. «It will be a moment of truth in Copenhagen whether we will set ourselves on course for disaster by taking a business as usual attitude or we will find the path of sustainable green growth,» he said. «We know the answer. We must take the course of sustainable green growth.» Ban is on a three-day trip to Japan before heading to Myanmar on Friday. The U.N. chief will hold talks with Japan's Prime Minister Taro Aso later Wednesday, according to a report of The Associated Press. The U.N. chief leaves for Singapore Thursday then will go to Myanmar.