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It is clear that much more drastic and early actions than those that are presently being undertaken are needed to limit the average global temperature increase to 1.5 °C above pre-industrial levels. The Asian region, accounting for a significant portion of global greenhouse gas emissions and growing at a rapid economic pace, has a major role to play in the world's transition to a low carbon society (LCS). To design leapfrog pathways to low carbon and sustainable development, it is important to have a scientific tool that can develop LCS pathways and analyze the effectiveness of policies to achieve them under different scenarios. The Asia-Pacific Integrated Assessment Model (AIM) is an effective tool to support these analyses. It has been developed by researchers in Asia and used in policymaking processes in Asia. It can provide comprehensive and consistent assessment of various policies, including macro-economic policies and technological measures. It can analyze trade-offs between rapid economic growth in Asia and its environmental impact and assess sustainable development policies. This paper presents the processes of designing LCS policies and how modeling tools can support the analyses of the leapfrog pathways to a LCS. As a modeling tool, the family of AIM models is explained and their applications in Asia are presented. Procedures to design and implement low carbon policies together with the Plan-Do-Check-Act cycle are also presented. [ABSTRACT FROM AUTHOR]

Mid- and long-term energy requirements and greenhouse gas emission scenarios for China were presented by using the Integrated Policy Assessment Model of China. Technologies are the key component to reach a low carbon future. Technologies are identified with the scenario analysis. In order to realize the low carbon future, a technology roadmap was presented to reach the emission reduction up to 2050 in China. Twenty-eight key technologies are given in the paper for the technology roadmap, presenting learning curves. With full adoption of these key technologies, we do see ample opportunities for China to make the emission stable after 2020, without a large increase, and even start to have a deep reduction after 2030. [ABSTRACT FROM AUTHOR]