自由主义国际法学注重单元层次的分析，强调国内结构偏好对国际层面的影响。多边气候谈判接连遭遇失败的主要原因是将国家视为功能相似体，忽视了单元层次的差异。借鉴国际贸易多边与区域并进的发展路径，自下而上的单元层次合作应成为应对气候问题的另一种思路。中、美、欧盟与印度等主要排放体之间的合作是2015年巴黎气候会议达成合作协议的关键，有助于上升到多边减排制度安排，或与多边合作互为补充。在提出2030年左右二氧化碳排放达峰值并且争取早日达峰和削减60％～65％碳强度减排目标后，减排已成为中国不可回避的问题。社会经济新常态下的中国应在巴黎气候会议之后化被动为主动，汲取国际贸易发展的历史教训，坚持多边与双边合作并进，强化与其他国家在气候能源技术方面的合作，打出既有“大集体”，也有“自留地”的组合牌，积极推进巴黎气候会议之后的减排举措。%The liberal theory of international law concerns more units,underlining the effect of domestic preference and structure on international community.Without considering units'difference,multinational climate cooperation has encountered a variety of conundrums.Based on the experience of international trade with both multi-nationalism and regionalism,it provides bottom up solution to global climate change.Coor-dination among major emitters will promote and replenish international level climate cooperation.After pro-posing peaking period of carbon dioxide emissions and submitting INDCs to the UNFCCC,it is urgent for China to consider and choose pathways to achieve these mitigation goals.With reference to international trade,China should insist on both multilateral and bilateral strategy to address climate change and enhance cooperation relating to energy,technology,trade and so on.
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