The Preliminary Research On The Relationship Between Changsha-Zhuzhou-Xiangtan's Environment Learning Curve And Its Potentials Of Energy-saving And Emission-reducing

Environmental learning curve is an regular change of the resource consumption amounts (or waste emissions) of unit product (or output) occurred in the production process of the enterprise (or industries) with the increase of production or repeated production process. It characterizes the achievements made by humans in ecological environmental protection with development of society and economy, and is a positive environmental economic theory related to building a resource-saving and environment-friendly society. Generally, environmental learning curve is simply expressed as energy or resource consumption per 10 thousand Yuan RMB GDP, and shows regular changes of pollutant emissions with increase in GDP per capita.Based on the statistics and data of Changsha-Zhuzhou-Xiangtan urban agglomeration (CZT) in 2001-2010, this paper established the environmental learning curves for energy consumption, SO2 and/or COD emissions per 10 thousand Yuan RMB GDP, analyzed potential of energy-saving and emission-reducing, decomposed regional targets of energy-saving and emission-reducing for the "twelfth five-year plan", and proposed measures of energy-saving and emission-reducing in CZT through literature collection, data collation and case studies. The main conclusions are given as follows:(1) Two kinds of environmental learning curves were validated, one for the manufactural industries in Changsha and another for the regions of CZT.(2) Energy consumption, SO2 and/or COD emissions per 10 thousand Yuan RMB GDP in CZT decreased power exponentially with increase in GDP per capita. The coefficients for those simulated cures were high, and fitted well to environmental learning curve model.(3) From the perspective of time, total amounts of energy consumption and SO2 and/or COD emissions in CZT increased annually with economy development. Meanwhile, energy consumption, SO2 and/or COD emissions per 10 thousand Yuan RMB GDP declined annually with economy development and technology improvement. From the perspective of space, the higher the levels of economy development, industrial structure, and the more extensive application the emission-reducing techniques, the smaller the energy consumption, SO2 and/or COD emissions per 10 thousand Yuan RMB GDP, and the smaller the potential of energy-saving and emission-reducing. Conversely, the lower the levels of economy development, industrial structure, and the less extensive application the emission-reducing techniques, the higher the energy consumption, SO2 and/or COD emissions per 10 thousand Yuan RMB GDP, and the greater the potential of energy-saving and emission-reducing. Among the three cities, the potential of energy-saving and emission-reducing was higher in Changsha than those in Zhuzhou and Xiangtan.(4) Based on the environmental. learning curve model, the regional targets of energy-saving and emission-reducing for the "twelfth five-year plan" in CZT were decomposed, and the results were as follows: to complete the goals of energy-saving, SO2 emission reduction and COD emission reduction in the "twelfth five-year plan" in CZT, Changsha should share in 10%,24%, and 26% reductions in energy-saving, SO2 emission reduction and COD emission reduction, respectively; Zhuzhou should share in 34%,33%, and 38% reductions, and Xiangtan should share in 56%,43%, and 36%.