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Abstract: In contrast to the ever-increasing focus on China's CO2 emissions, little attention has been given to its CH4 emissions, the second largest greenhouse gas. Presented in this paper is a comprehensive assessment of the CH4 emissions in Mainland China by source and region based on the latest statistical data and research literatures available. The total CH4 emission in China 2007 is estimated as 38.6Tg, one and a half times of that in USA. Even by the lower IPCC global warming potential (GWP) factor of 25, it corresponds to 964.1MtCO2-eq, in magnitude up to one seventh of China's CO2 emission and greater than the nationwide gross CO2 emissions in Australia, Canada, and Germany in 2007. As the leading emission source, energy activities are responsible for 45.3% of the total emission, agricultural activities contribute a comparable share of 40.9%, followed by waste management of 13.8%. Among all the 11 major emission sources, coal mining (38.3% of the total), enteric fermentation (21.4%) and rice cultivation (14.4%) essentially shape the CH4 emission profile for China, quite different from that for USA which is characterized by prominent emissions from enteric fermentation, municipal solid waste landfill and natural gas leakage. The Western and Central areas contribute 70.9% of the total nationwide emission and Shanxi is the largest regional CH4 emitter with an amount of 4.6Tg. The five regions of Xizang (Tibet), Shanxi, Qinghai, Ningxia, and Guizhou are identified with the largest emissions per-capita and emission intensities. In contrast to the focused areas of CO2 emission reduction mainly in the energy-intensive eastern regions, the mitigation potential of CH4 emissions in the western and central regions is huge by integrating emission quantity and structure with emission per-capita and emission intensity at the regional level. Corresponding policy-making implications for CH4 emission mitigation in China are addressed. [Copyright &y& Elsevier]

Abstract: Due to the rapid economic and social development, China''s power generation mix is dominated by thermal power, resulting in rapid growth of CO2 emission during the past decades. Suffering from the two severe problems of energy crisis and global warming, power generation mix should be optimized by installing more new energy during China''s 12th and 13th Five-Year Plan periods. In order to realize the massive utilization of new energy and realize emission reduction targets in the future, it is of great significance for China to promote development of large new energy bases such as hydropower, wind power, solar power, nuclear power etc. In this paper we provide an overall review of China''s large new energy bases development with a detailed presentation of construction status and future plan, analyze the policy problems and technology barriers hindering the development of new energy bases in China, which will provide sound reference for policy makers. [Copyright &y& Elsevier]

Abstract: Global warming, increased energy demand, and tremendous air pollution are forcing China to revise its energy structure of electricity generation dominated by coal (80% of total electricity) towards low-carbon electricity. Vigorous development of carbon-free energy resources of electricity is a practical way towards low-carbon electricity in China. In this paper, we shall outline renewable power generation (hydropower, wind power, solar energy, biomass energy, nuclear power, ocean energy and geothermal) together with nuclear power for China, present a reserves assessment, the current status, and barriers for further development, and finish with an outlook towards the future. In our view, China has plenty of free-carbon energy resources to revolutionize its electricity structure and redirect it towards low-carbon electricity systems. Needed are the effective energy policies to get to the way. [Copyright &y& Elsevier]