| Since the reform and opening up,China's economy has grown rapidly and achieved remarkable results.However,behind the rapid economic development is the large consumption of fossil energy,and a large amount of greenhouse gases and polluting gases are generated.The previous extensive economic growth model was not sustainable.In the face of global warming,energy depletion,and air pollution,controlling greenhouse gas and air pollutant emissions has become an urgent task for mankind.At this stage,although the well-being of the people is constantly improving,China still regards economic development as one of its important tasks.Therefore,this paper explores the coordinated development of the economy and the environment,and then investigates the related paths,affect each other,between the two.Finally,this paper provides relevant policy suggestions for the transformation of China's economic growth mode and the improvement of environmental quality.This study has great theoretical and practical significance.In this paper,based on the original Tapio elastic coefficient,a new elastic index is constructed,that is,the decoupling situation with a certain year as the fixed base period.To this end,this paper makes theoretical deduction and practical application of the new decoupling index.This indicator aims to explore the role of long-term policies,which has certain advantages over the decoupling of each year.Secondly,this article analyzes the current state of carbon emissions decoupling and haze decoupling at the national and regional levels respectively,in order to grasp the changing trend of decoupling overall and locally.Then,this article explores carbon emissions decoupling and haze decoupling in depth.LMDI-IDA is employed to decompose the two types of decoupling,and the contribution of their influencing factors is explored,which can accurately grasp the policy guidance of reducing the decoupling index.Using the concept of elastic coefficient,the sensitivity coefficient model is derived,and the sensitivity of decoupling index to influencing factors is also investigated.Meanwhile,this paper also explores technical and non-technical effects in decoupling.Finally,due to the dual pressures of air pollution and greenhouse gas emission reduction,this paper investigates the synergistic relationship between haze decoupling and carbon emission decoupling.Using panel data,based on Geographically and Temporally Weighted Regression(GTWR),spatiotemporal variation of the synergistic relationship between haze decoupling and carbon emissiondecoupling is investigated.Not only that,this article also explores the synergy between the decoupling of carbon emission reduction factors and haze decoupling.Based on the empirical results,this paper draws the following conclusions:(1)Based on the new decoupling index,it is found that in the haze decoupling decomposition,per capita GDP is the main positive driving factor,and the emission coefficient is the main negative driving factor.Compared with the old decoupling index,The trend of the contribution of the various factors of the new decoupling index is very obvious.The driving effect of per capita GDP,emission coefficient and the proportion of fossil energy is gradually weakening,while the driving effect of energy intensity is gradually increasing.In the analysis of GTWR results,the fitting degree of the new decoupling index is much higher than that of the old decoupling index.In the eastern and central regions,the coefficients of energy structure,industrial structure,energy intensity,technological progress,and labor proportion are similar,but there are also differences.However,there is a clear difference between the impact of fixed asset investment and urban population on the decoupling index.In the western and central regions,except for the opposite signs of the coefficients of industrial structure,energy intensity,and technological progress,the coefficients of other influencing factors in the western region are basically similar to those of the central region.(2)From 2001 to 2014,there were only two decoupling states of carbon emissions decoupling: weak decoupling and growth connection.There are basically three or more decoupling states in each province: weak decoupling,growth connection,and negative growth decoupling.Per capita GDP is the main contributing factor,and the contribution of the population is small.Over time,the contribution of per capita GDP increased first and then decreased,and the contribution of the population remained basically unchanged.Negative driving factors are: emission coefficient,energy structure,energy intensity,and population proportion,of which energy intensity contributes the most.The energy structure,energy intensity,industrial structure,technological progress,labor proportion,urban population,and import and export trade in most regions have a positive impact on the decoupling index of carbon emissions and GDP,and the coefficients in each region have significant spatial and temporal variations.Among them,the energy intensity of Hunan,Guangdong,Guangxi and other regions has a rebound effect.The coefficient of the industrial structure in the central and western regions is negative,and the coefficient of some eastern regions with high levels of urbanization is also negative.The positive value ofthe import and export trade coefficient confirms that the "pollution refuge" phenomenon exists in most regions.The impact of fixed asset investment on the decoupling index is negative.(3)The improvement of the energy structure is very effective in reducing the two decoupling indexes.In the analysis of haze decoupling sensitivity,Hebei,Shanxi and Shandong should be the key provinces.In the analysis of carbon emissions decoupling,Shanxi's carbon emissions decoupling should focus on improving the energy structure and energy efficiency.The technical and non-technical effects in haze decoupling are symmetrically distributed.The technical effects of carbon emissions decoupling are significantly lower than the non-technical effects,and the contribution of various factors to the non-technical effects of carbon decoupling is greater than the technical effects.(4)In the decomposition of synergistic decoupling,from 2001 to 2014,technological progress in carbon emissions was the main negative driving factor,and the ratio of potential carbon emissions to potential haze(potential ratio)was the main positive driving factor.Shanxi's carbon emission technology has the most negative driving effect,and Shandong's potential ratio has the largest positive contribution.Carbon emissions decoupling efforts have a negative impact on the haze decoupling,which indicates the existence of synergy effects,and in the later period,the value of synergy effects tends to be flat.According to the trend of the synergistic decoupling effect of the provinces,China is divided into seven major sections.The emission factor has the largest synergy effect.In the short term,the synergy effect of the population is greater than the energy intensity,but in the long run,the synergy effect of the energy intensity is greater than the population.Therefore,the improvement of the energy intensity and the adjustment of the energy structure should be the key measures.(5)Based on the above analysis and discussions,According to China's current situation,policy recommendations for coordinated development between economy and environment and synergistic reduction between carbon emissions and haze mainly include adjusting industrial structure,improving import and export quality,and establishing a balanced relationship between economic development and ecological environmental protection.There are 81 figures,19 tables and 110 references in the paper. |
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