Study On Regional Differences Of Influencing Factors For China's Industrial Air Pollutants

In the past decade,the rapid development of industry has not only promoted China's economic growth,but also brought great environmental pressure,and ndustrial air pollutants has become increasingly serious.The regional emission reduction determines the national emission reduction for one country,and the differences in regional economic characteristics may result in regional differences in air pollutants.Therefore,this paper takes industrial air pollutants(SO₂,NOx and PM_2.5)as the research object,and explores regional differences in factors that influence industrial air pollutants in economic development based on the regional perspective of the three-part method and the seven part method.First,this study extends the STIRPAT model and uses China's provincial panel data during 2005-2015to explore regional differences in impacts of GDP per capita and urbanization on industrial SO₂,NOx,and PM_2.5 in China.Results show that,an inverse“U”shaped or inverse“N”shaped relationship existed in China's eastern and central regions,and a“U”shaped relationship existed in China's western region,between GDP per capita and industrial air pollutants;on the whole,the economic growth reduced industrial air pollutants in eastern region,but promoted industrial air pollutants in other regions.There was a“U”shaped relationship between population urbanization and industrial air pollutants in China's eastern region,a linear relationship in the central region,and a“U”shaped or inverse“N”shaped relationship in western region.There was an inverse“U”shaped relationship between land urbanization and industrial air pollutants in all regions.Increases in the population and land urbanization levels in China's eastern region would promote industrial SO₂ and NOx,but reduce industrial PM_2.5;increases in population and land urbanization levels in the central and western regions reduced industrial air pollutants.The population scale and industrialization had a promoting impact on industrial air pollutants;the energy efficiency had a slight inhibitory impact.Second,this study constructs a regional contribution index of different factors through an extended LMDI-PDA?Logarithmic Mean Divisia Index and Production Decomposition Analysis?method,and investigates regional differences in factors driving the changes of China's major industrial air pollutants.It reveals that the regional emission efficiency effect was a key inhibitory factor on industrial air pollutants,which was more obvious in east and north China.The regional energy intensity had greater inhibitory effects on industrial SO₂ and NOx than on PM2.5,and these inhibitory effects were more obvious in east China.The regional technical efficiency,technology improvement,capital?energy substitution and labor?energy substitution effects each reduced industrial SO₂,NOx,and PM_2.5by about 3500,3100,and 1500 kt from 2005 to 2015,respectively.For the regional technical efficiency and technology improvement effects,the degree to emission reduction was great in East and Central China,and small in south,northwest and northeast China.For the regional capital?and labor?energy substitution effects,the degree of emission reduction was great for north,east and central China,and small for northwest and south China.The regional output proportion effect increased SO₂,NOx,and PM_2.5 by 1211.2,320.1,and 277.8 kt from 2005 to 2015,respectively.The national economic growth had a relatively great promoting effect and increased SO₂,NOx,and PM_2.5 by 26,445.5,23,827.5,and 11,925.5 kt from 2005 to 2015,respectively.Main conclusions and policy implications are put forward based on empirical results.