Analysis The Evaluation System Of Low-carbon Eco-city Development At Changsha

The gas emission of carbon dioxide of the global greenhouse is amounted from 28.7 billion tons to 490 million tons. It is far beyond the range of natural variability over the past 65 years. Global warming is an indisputable fact.The International Energy Agency pointed out that the main original of CO2 emission's growth comes from cities. The international community has the consensus that the city should adjust the structures of the economy, the energy consumption, and lower carbon development. Nowadays, the urbanization is developed rapidly in China.The problems in this stage include that how to promote economic development while reducing carbon emissions and achieve sustainable development between man and nature.Firstly, in this paper, we based on the clear concept and meaning of low-carbon and ecological urban, to reference the methods and ideas of the evaluation and model from the low-carbon and ecological urban on domestic and abroad, and to propose the principle of low-carbon and ecological urban construction of evaluation. And to build the Evaluation System based on the hierarchical construction of low-carbon and ecological urban analysis. The index system is amounted to 38 guidelines. It is including three aspects:natural system, economic system and social system.Secondly, we use the index system to analyze empirically the low-carbon and ecological construction in Changsha. The results from the index 0.7805,0.8121,0.8644, 0.9259,0.9991,1.0215. It showed the increase of the low-carbon and ecological index in Changsha from 2004 to 2009.The urban ecological environment is more better, the potential of the build low-carbon and ecological urban construction is more enormous. However, the energy consumption, per capita water consumption in urban, the tourism industry and other specific target value are far behind the national standard in the proportion of GDP.Finally, we make some main contents and the developing strategies from the natural, economic, social and energy fields to help the build of low-carbon and ecological Changsha.