Decomposition Analysis Of CO₂ And SO₂ Emissions In China's Industries

China is the country with the largest emission of CO₂ and SO₂.In order to effectively control the emission of CO₂ and SO₂,our country has determined the constraints of the CO₂and SO₂ emission reduction.It is an important prerequisite for effective control of CO₂ and SO₂ emission to make clear the influence factors and the contribution of each factor.There are a series of common factors affecting CO₂ and SO₂ emissions.However,most of the current researches on impact factors only focus on one of them.According to the author's search,no literature on the simultaneous impact of CO₂ and SO₂ emissions has been found.To this end,the impact factor decomposition of CO₂ and SO₂ emission was studied in this paper.According to the different processing methods of electricity and thermal consumption,the CO₂ emission accounting methods used in the current literature can be divided into two types:apportionment method and non apportionment method.The two methods have their own advantages and disadvantages,and the current literature only ues one of them.This paper used two methods simultaneously to calculate the CO₂ emissions of industrial industries in China for the last ten years.In order to highlight the contribution of the key industries and reduce the amount of calculation,China's industrial sectors were classified as 12 in this paper.On this basis,this paper analyzed structural characteristics and industry differences of industrial CO₂ and SO₂ emissions,using LMDI decomposition?LMDI?and"the impact of China's industrial CO₂ and SO₂ emission factors in 11th Five-Year"and"12th Five-Year"period and the contribution of each factor quantitatively.The logarithmic mean Di's index?LMDI?method was used to decompose the main influencing factors and the contribution of various factors of industrial CO₂ and SO₂ emissions in"11th Five-Year"and"12th Five-Year".The results of this study showed as followed:?1?In terms of change trend,China's industrial CO₂ emissions increased year by year in2006-2013 years,and began to decrease slightly in 2014,but the total CO₂ emissions were still high.The"11th Five-Year"and"12th Five-Year"periods of SO₂ emissions declined significantly.In terms of emission industry structure,under the apportionment method,China's industrial CO₂ emissions were concentrated in steel,chemical industry and building materials industry.Among them,the proportion of CO₂ emission in the steel industry accounted for more than 25%of the industrial emissions over the years,and the proportion of the chemical industry and building materials industry was more than 12%and 10%respectively.Under the non apportionment method,CO₂ emissions were concentrated in the electric heating and steel industry,in which the CO₂ emissions of the electric heating industry over the years accounted for more than 50%of the industrial emissions,and the proportion of the iron and steel industry was close to 20%.SO₂ emission was the most prominent in the electric heating industry.In the"11th Five-Year"period,its SO₂ emissions accounted for more than 50%of the total industrial emissions,and in"12th Five-Year"period the proportion was gradually reduced to 36%.?2?In terms of influencing factors and contributions,for the CO₂ emissions and SO₂emissions under apportionment method and non apportion method,the expansion of industrial scale was the biggest factor to stimulating the emission growth,and the reduction of energy intensity was the main factor to promote the reduction of emissions.Emission factor was the largest contributor to reduce SO₂ emissions and was also conducive to the reduction of CO₂emission under apportionment method,but not conducive to the reduction of CO₂ emission under non apportionment method.The effect of energy structure and industrial structure on emission reduction was not ideal,and the effect of energy structure on CO₂ emission under two methods stimulated growth.The industrial structure factor in the"12th Five-Year"period also improved the growth of CO₂ emission.In general,the contribution of various factors was mainly the six high energy consuming industries.Based on industry structure and influence factors of CO₂ and SO₂ emission,this paper proposed to further promote emission reduction recommendations,including to improve the quality of development in a more prominent strategic position,control the output value proportion of high energy consuming industries,continue to promote energy saving of industry especially high energy consuming industries,and effectively strengthen the optimization of the industrial structure and energy structure etc.,and all these advices made clear the main direction of the emission reduction.The integrated use of apportionment and non apportionment methods can indeed avoid omission or one-sided information caused by using only one of them.The simultaneously decomposition of CO₂ and SO₂ emissions was conducive to promoting the synergistic reduction of both emissions.There are a large number of industrial industries.According to the emission share,the appropriate merge of industry can highlight the contribution of key industries,and also help to reduce the amount of calculation.