China should strive to become a global leader in combatting climate change with green development and clean energy, U.N. Secretary-General Ban Ki-moon said Friday, AP reported. Ban said the Chinese government must make it a priority to foster sustainable, low-emissions development in order to battle climate change and to set an example for developing countries and the rest of the world, He was speaking at The Green Lights Project to promote the use energy-saving lamps across China. «Without China, there can be no success this year on a new global climate framework,» said Ban, referring to the U.N. climate summit to be held in Copenhagen, Denmark, this December. The question of which nations will agree to limit their greenhouse gases _ mainly from burning fossil fuels for electricity and transportation _ is taking on increasing urgency at the United Nations, which is sponsoring the talks to achieve the climate deal in Copenhagen. Ban has made it his top priority to persuade nations to agree to a successor treaty to the 1997 Kyoto Protocol for reducing greenhouse gases that expires at the end of 2012. Ban's comments Friday came a day after the United States called on China to use high-level meetings between the countries next week to negotiate improved cooperation on curbing greenhouse-gas emissions.