Feasibility Study On The Collaborative Governance Of Carbon Emissions And Air Pollution In Provincial Capitals Of Six Central Provinces In China

At present,China has put forward the dual vision of building a beautiful China and achieving"double carbon"emission reduction,while the natural science characteristics of greenhouse gases and air pollutants have the same root and origin,which makes the synergy of pollution reduction and carbon reduction the best choice in the field of environmental management.The rough economic development mode and backward environmental management policies in the central region are obviously unable to achieve the dual target vision,and it is important to explore the synergy between carbon emissions and air pollutants to guide emission reduction tasks.Due to the availability of data,this study selects pollutant data and carbon emission data of six central provinces and provincial capitals from 2015-2019,firstly,compares the air pollution and carbon emission situation of each province and provincial capital city;then constructs a GTWR model with carbon emission as the dependent variable and air pollutant as the independent variable to conduct an empirical analysis of the feasibility of synergistic governance;finally,the feasibility of collaborative management of carbon emissions and air pollutants in each province and provincial capital city is explored based on empirical data.The main research findings are as follows:（1）From 2015 to 2019,the annual average concentrations of all pollutants in the six central provinces,except for O₃,showed a decreasing trend,and it is worth noting that the concentrations of various pollutants in each province decreased in 2018;there are obvious inter-provincial differences in the amount of decrease in pollutant concentrations,with the largest decreases in PM_2.5 and PM₁₀ concentrations being in Henan Province,respectively down 21.12μg/m³and 36.61μg/m³.The largest decreases in SO₂ and CO were in Shanxi Province,with decreases of 36.48μg/m³and 0.69μg/m³,respectively,while the largest decrease in NO₂ was in Henan Province（7.20μg/m³）and the smallest increase in O₃ was in Hubei Province（7.37μg/m³）.（2）From the interannual changes of pollutant concentrations in the provincial capital cities,the concentrations of particulate matter,SO₂and CO are decreasing year by year,the concentration of NO₂ is rising and then decreasing,and the concentration of O₃ is increasing year by year;from the seasonal changes,the overall performance is high in winter and spring and low in summer and autumn,and the seasonal changes of different pollutant concentrations are slightly different in different cities;the monthly average changes of various pollutant concentrations are different.Particulate matter concentration changes in a"U"shape,with the highest concentration in December and January and the lowest concentration in July and August;CO and NO₂ concentrations change relatively quickly in a"V"shape;the concentration of O₃ changes roughly in an"M"pattern,with the first peak in May and June,a slight decrease in July,and the peak again in August and September.Spatially,the overall concentration in the north is greater than that in the south,and the concentration in the east is lower than that in the west.（3）The carbon emissions of the six central provinces show an overall increasing trend during the study period,with the largest increase from 2010 to 2011,and the growth rate stabilizes after 2015,but there is an obvious inter-provincial difference,with the carbon emissions of Henan Province show a decreasing trend.Among the provincial capitals,Zhengzhou and Taiyuan show a decreasing trend in carbon emissions,while Wuhan shows a fluctuating upward trend in carbon emissions,while the emissions of these three cities are significantly higher than those of other cities;in terms of carbon emission intensity,the six central provinces and provincial capitals show a decreasing trend.At the provincial level,the largest decline is in Hubei Province（62.47%）,and the lowest decline is in Shanxi Province（32.87%）.Among the provincial capitals,the largest decrease was in Zhengzhou（69.84%）,and the smallest decrease was in Hefei（42.10%）;in terms of emission reduction and emission reduction rate,the change curve of cumulative emission reduction in the central region was an irregular"M"shape,and the change of average emission reduction rate was a flat"inverted U"curve at the bottom.The change in the average abatement rate is an"inverted U"curve with a flat bottom.The change curves of cumulative emission reduction and average emission reduction rate in provincial capitals are irregularly"M"shaped.（4）Analyzing the synergistic effect of carbon emissions and atmospheric pollutants in six central provinces,it is found that NO₂ has the best and positive synergistic effect with carbon emissions,and the strongest negative synergistic effect is SO₂.In terms of time change,the synergistic effect index of carbon emissions and atmospheric pollutants in six central provinces from 2015 to 2019 is generally not high and shows a slightly decreasing trend.Spatially,the synergistic effects of all pollution and carbon emissions are better in the south than in the north.（5）In terms of the synergistic effect of carbon emissions and air pollution in provincial capital cities,the best synergistic effect with carbon emissions is SO₂,which is a negative synergistic effect.From the time change,the synergistic effect index of carbon emissions and air pollutants in provincial capital cities from 2015 to 2019 shows an increasing trend,especially the increase of PM_2.5,PM₁₀,CO and O₃ is very obvious;from the city difference,the synergistic effect of different air pollutants and carbon emissions in different cities has obvious differences;in general,the 2018 and 2019 provincial capital cities of various pollutants and carbon emissions have better synergistic effects.（6）The six central provinces and provincial capitals to reduce pollution and carbon,first of all,to accelerate the construction of the rule of law structure system for collaborative governance of pollution reduction and carbon reduction,to achieve the synergy of emission reduction and pollution control in accordance with the law;secondly,we should accelerate the transformation of the energy consumption structure mainly based on high-carbon fossil energy,optimize the industrial structure,eliminate backward industries,and restrict the development of high pollution and high-emission enterprises;finally,we should encourage more governance subjects to participate in the governance action of pollution reduction and carbon reduction,and form a governance system guided by the government,regulated by the market,implemented by enterprises the enterprises and participated by all people.