On October 19, 2007, the United Nations Intergovernmental Panel on Climate Change released the final part of its fourth Global Climate Change Assessment Report, pointing out that global warming is unquestionable. Climate change has become the main topic of a series of important international conferences this year. On December 3 to 15, the United Nations Climate Change Conference held in Bali, Indonesia, adopted the Bali Roadmap, which set the agenda for negotiations for the first commitment to reduce greenhouse gas emissions after the expiration of the Kyoto Protocol in 2012. Developing countries including China generally believe that climate change negotiations should be conducted within the framework of the United Nations in accordance with the principle of ¡°common but distinct responsibility¡± and equality. On December 15, the last day of the United Nations Climate Change Conference was held in