A Study On The Spatial Differences And Influencing Factors Of Sulfur Dioxide Emissions In China

Over the past 40 years of reform and opening up,China’s economy has developed rapidly and people’s living standards have been continuously improved.The GDP that reflects the country’s comprehensive strength now ranks the second in the world.With the rapid economic development,China’s environmental pollution has become an important concern of the government and the public.As one of the most important air pollutants,excessive emission of sulfur dioxide has a negative impact on sustainable economic development and people’s quality of life.Therefore,it is of great practical significance to study the spatial difference of sulfur dioxide emissions and its influencing factors from a provincial perspective and put forward reasonable policy suggestions.The major content of this paper includes following aspects:(1)a comprehensive summary,summary and review of the existing literature on sulfur dioxide emissions;(2)descriptive statistical methods were used to analyze the current situation of sulfur dioxide emissions and economic development in China’s four major regions,and the spatial differences of sulfur dioxide emissions in China’s regions were studied with the thiel index weighted by regional GDP.(3)it is based on the country 30 provinces in2004-2016 panel data,using the nonparametric point regression estimation model of provincial level of urbanization in China,the industrial structure,economic openness,energy structure,economic development level,and the influence of the energy efficiency of sulfur dioxide emissions,and after a point for each factor to estimate,finally get the factors about the change characteristics of sulfur dioxide;(4)using static single-threshold regression models to study the regional effects of energy efficiency and sulfur dioxide emissions;(5)on the basis of summarizing the research results,policy suggestions for reducing sulfur dioxide emissions are put forward.The main conclusions of this paper are summarized as follows:(1)in terms of economic development level: in the eastern region in 2016,second in the central region,third in the western region and fourth in the northeast region;And it’s the highest in the west in terms of sulphur dioxide emissions,the second most eastern part of the eastern region,and the lowest in the northeast region.(2)the results of parameter andnon-parameter panel estimation also show that the urbanization level and energy efficiency are negatively correlated with sulfur dioxide emissions,while the industrial structure,economic openness,energy structure and economic development level are positively correlated with sulfur dioxide emissions.(3)nonparametric point estimation results showed that all the variables on the level of urbanization,industrial structure,economic openness,energy structure,energy efficiency,economic development level between the point estimate figure has six types,respectively is: "ascending","descending","U","inverted U","W" and "N";this requests us in considering sulfur dioxide emission reduction,carefully observe the inflection point that result in the change of sulfur dioxide,and then formulate corresponding policies and measures.(4)The results of the threshold model show that there is a regional effect between energy efficiency and sulfur dioxide emissions,and under different regional systems,energy efficiency plays a positive role in reducing sulfur dioxide emissions.