4.1 Driving force effect of embodied carbon emissions transferred from industries in Shanxi to other regions
The driving force effect of intermediate (final) demand embodied carbon emissions transferred from Shanxi to other industries during 2007-2012 was decomposed, and the driving force effect of the industries with the largest increase in intermediate (final) demand embodied carbon emissions transferred from Shanxi to other regions was analyzed (see Fig. 5).
The intermediate demand embodied carbon emissions transferred from Shanxi to other regions were mainly concentrated in the production and supply of electricity, gas and water, chemical industry, construction industry, electrical machinery and electronic communication equipment manufacturing industry, metal smelting and product industry, et al. (see Fig. 5 (a)). In general, the carbon emissions strength effect and the intermediate demand scale effect had the biggest impact on the change of intermediate demand embodied carbon emissions exported from Shanxi to other regions. For the change of carbon emissions, the carbon emissions strength effect had a significant inhibition effect, the intermediate demand scale had a significant promotion effect, and the input-output structure effect and the intermediate demand structure effect had different effects in different industries. The increasing of intermediate demand embodied carbon emissions of the production and supply of electricity, gas and water transferred from other regions to Shanxi Province during 2007-2012 was as high as 20.2039 million t. Among them, the carbon emissions reduced by the carbon emissions strength effect was 20.6069 million t, and the input-output structure effect played a restraining role. Additionally, the embodied carbon emissions increased by the intermediate demand structural effect and the intermediate demand scale effect were 17.7653 million t and 23.8733 million t, respectively. The intermediate demand carbon emissions embodied reduced by the carbon emissions strength effect transferred from Shanxi to the chemical industry in other regions was as high as 18.06009 million t. The input-output structure effect, intermediate demand structure effect and intermediate demand scale effect were the driving factors that leading to the increase of intermediate demand embodied carbon emissions transferred from Shanxi Province to chemical industry in other regions, and the intermediate demand scale increased the embodied carbon emissions by 28.702 million t. Therefore, the intermediate demand carbon emissions embodied transferred from Shanxi to the chemical industry in other regions increased by 12.897 million t during 2007-2012. The increasing of intermediate demand embodied carbon emissions transferred from Shanxi to other regions was promoted by the input-output structure effect and hindered by the intermediate demand structure effect. The embodied carbon emissions reduced by the carbon emissions strength effect was 13.7905 million t, and the embodied carbon emissions increased by the intermediate demand scale was 28.1492 million tons. The input-output structure effect and the intermediate demand structure effect were the influencing factors to increase the intermediate demand embodied carbon emissions transferred from Shanxi to other regions. The input-output structure effect and the intermediate demand structure effect had a significant negative effect on the change of intermediate demand embodied carbon emissions transferred from Shanxi to the metal smelting and product industry in other regions. and the intermediate demand scale effect had an obvious positive effect on the increase of the intermediate demand embodied carbon emissions transferred from Shanxi to the metal smelting and product industry in other regions, and the increased carbon emissions reached to 39.7033 million t. The intermediate demand embodied carbon emissions transferred from Shanxi to the metal smelting and product industry in other regions increased by 7.942 million t during the study period.
The carbon emissions strength effect and the final demand scale effect had the most significant effect on the final demand embodied carbon emissions transferred from Shanxi to industries in other regions (see Fig. 5(b)). The effect of carbon emissions strength effectively reduces the carbon emissions and the final demand scale effect played a leading role in the increase of carbon emissions. The final demand embodied carbon emissions transferred from Shanxi to the construction industry in other regions increased by 11.012 million t during 2007-2012, and the input-output structure effect and the final demand structure effect had positive effects on it. The final demand embodied carbon emissions reduced by the carbon emissions strength effect transferred from Shanxi to the transportation equipment manufacturing in other regions was 5.5372 million t, and the input-output structure effect and the final demand structure effect are the driving factors to increase the carbon emissions embodied in the final demand of the transportation equipment manufacturing industry in other regions, and the embodied carbon emissions increased by the final demand scale effect was as high as 896.98 million t. The input-output structure effect and the final demand structure effect were the influencing factors to increase the final demand embodied carbon emissions transferred from the electrical machinery and electronic communication equipment manufacturing industry in other regions to Shanxi. The carbon emissions strength effect reduced the embodied carbon emissions in the electrical machinery and electronic communication equipment manufacturing industry by 8.3687 million t. The final demand carbon emissions embodied transferred from Shanxi Province to other regions in the manufacturing of electrical machinery and electronic communication equipment increased by 2.5173 million t during 2007-2012. The final demand embodied carbon emissions transferred from Shanxi to other services in other regions increased by 2.2996 million t during the study period. The final demand structural effect had a negative effect on the change of final demand embodied carbon emissions transferred from Shanxi to other services in other regions. And the input-output structure effect was the driving force effect of increasing the final demand embodied carbon emissions transferred from Shanxi to other services in other regions.
In conclusions, the embodied carbon emissions transferred from Shanxi to other regions were mainly concentrated in high-energy-consuming industries, and the carbon emissions strength effect and the intermediate (final) demand scale effect had the biggest impact on them. Among them, the carbon emissions strength effect significantly reduced the embodied carbon emissions imported from Shanxi to industries in other regions, and the intermediate (final) demand scale effect was conducive to the increase of carbon emissions. And the input-output structural effect and intermediate (final) demand structural effect had different effects in different industries. The most effective way to reduce carbon emissions input was to adjust and optimize the consumption demand of industries in other regions according to the above analysis results. Additionally, the role of input-output technology and production (consumption) structure in different industries was targeted to develop mitigation plans.
4.2 Driving force effect of embodied SO2 emissions transferred from industries in Shanxi to other regions
The intermediate demand scale effect and the input-output structure effect were the driving factors that increasing the intermediate demand embodied SO2 emissions transferred from Shanxi to industries in other regions, and the effect of the intermediate demand scale effect was more significant. Additionally, the carbon emissions strength effect of was the leading force to reduce the intermediate demand embodied SO2 emissions (see Fig. 6(a)). The construction industry was the industry with the largest increase of 77,700 t in the intermediate demand embodied SO2 emissions transferred from Shanxi to other regions during 2007-2012. The intermediate demand structural effect was a factor to reduce the embodied SO2 emissions transferred, and the SO2 emissions increased by the intermediate demand scale effect as much as 163,900 t. The intermediate demand structural effect increased the intermediate demand embodied SO2 emissions transferred from Shanxi to the production and supply of electricity, gas and water in other regions. The intermediate demand embodied SO2 emissions transferred from Shanxi transferred to the production and supply of electricity, gas and water in other regions increased by 64,500 t during the study period. The change of intermediate demand embodied SO2 emissions from Shanxi to other regions of metal smelting and product industry was hindered by the intermediate demand structural effect, and the embodied SO2 emissions increased by the scale effect of intermediate demand was 234,600 t. Additionally, the intermediate demand embodied SO2 emissions transferred from Shanxi to the metal smelting and product industry in other regions increased the by 50,500 t during 2007-2012. With the increase of input-output structure effect, intermediate demand structure effect and intermediate demand scale effect, the intermediate demand embodied SO2 emissions transferred from Shanxi to the electrical machinery and electronic communication equipment manufacturing industry in other regions offset that of sulfur emissions strength effect. Therefore, the intermediate demand transferred from Shanxi to the electrical machinery and electronic communication equipment manufacturing industry in other regions increased the SO2 emissions during 2007-2012.
The final demand scale effect and the input-output structure effect were the driving factors that increasing the final demand embodied SO2 emissions transferred from Shanxi to other industries during 2007-2012, and the sulfur emissions strength effect was the leading factor to reduce the final demand embodied SO2 emissions (see Fig. 6(b)). The construction industry was the industry with the largest increase of 74,300 t in final demand embodied SO2 emissions transferred from Shanxi to other regions during the study period. And the final demand structural effect of increased the final demand embodied SO2 emissions. The input-output structure effect, the final demand structure effect and the final demand scale effect increased the final demand embodied SO2 emissions of the transportation equipment manufacturing industry transferred from Shanxi to other regions by 33,700 t. The influencing factors of the final demand embodied SO2 emissions of electrical machinery and electronic communication equipment manufacturing industry transferred from Shanxi to other regions were decomposed. It could be seen that the increased embodied SO2 emissions from input-output structure effect, final demand structure effect and final demand scale effect offset the decreased embodied SO2 emissions from the effect of sulfur emissions strength. Therefore, the final demand embodied SO2 emissions transferred from Shanxi to the electrical machinery and electronic communication equipment manufacturing industry in other regions increased by 13,300 t during 2007-2012. The change of the embodied SO2 emissions transferred from Shanxi to the machinery industry in other regions was promoted by the final demand structural effect during 2007-2012.
Combined with the above analysis, it could be seen that the hidden SO2 emissions transferred from Shanxi to other regions were mainly distributed in industries with large energy demand. The intermediate (final) demand scale effect and input-output structure effect both increased the embodied SO2 emissions in other regions, while the sulfur emissions strength effect had a negative effect, and the intermediate (final) demand structure effect increased the embodied SO2 emissions in most industries in other regions. Therefore, controlling the input of SO2 emissions in other industries required controlling the consumption demand, adjusting the production structure and improving the technology input.
4.3 Driving force effect of embodied carbon emissions transferred from industries in other regions to Shanxi
The driving force effect of intermediate (final) demand embodied carbon emissions transferred from industries in other regions to Shanxi was decomposed into carbon emissions strength effect, input-output structure effect, intermediate (final) demand structure effect and intermediate (final) demand scale effect. The paper focused on the industries with large increase in intermediate (final) demand embodied carbon emissions transferred from industries in other regions to Shanxi during 2007-2012 (see Fig. 7).
The carbon emissions strength effect effectively hindering the increasing of intermediate demand embodied carbon emissions from industries in other regions to Shanxi, and the intermediate demand scale effect and input-output structure effect had significant contribution to its increasing (see Fig. 7(a)). The intermediate demand carbon emissions transferred from the main industries including the mining industry, construction industry, metal smelting and product industry, commercial industry and transportation industry to Shanxi had a large increasing, during 2007-2012. The intermediate demand structural effect played a positive effect on the increasing in carbon emissions of these industries. The mining industry was the industry with the largest increasing in the intermediate demand embodied carbon emissions transferred from other regions to Shanxi, and only the intermediate demand scale effect increased the carbon emissions as high as 9.2516 million t. Additionally, the intermediate demand embodied carbon emissions transferred from other regions to Shanxi increased by 6.0034 million t during 2007-2012. The intermediate demand embodied carbon emissions transferred from the construction industry in other regions to Shanxi increased by 5.2880 million t, and the carbon emissions strength effect reduced the intermediate demand embodied carbon emissions by 6.3206 million t, which had a significant negative effect on the change of the intermediate demand embodied carbon emissions in Shanxi Province during 2007-2012. By decomposing the factors affected the intermediate demand embodied carbon emissions transferred from the metal smelting and product industry in other regions to Shanxi, it could be seen that the carbon emissions decreased by the carbon emissions strength effect reached to 5.6057 million t, and the carbon emissions increased by the input-output structure effect, the intermediate demand structure effect and the intermediate demand scale effect reached to 8.714 million t. Therefore, the intermediate demand embodied carbon emissions transferred from the metal smelting and product industry in other regions to Shanxi increased by 3.1087 million t during 2007-2012. Among the factors affected the intermediate demand embodied carbon emissions transferred from the commercial and transportation industries in other regions to Shanxi, the positive effects of the input-output structure effect, the intermediate demand structure effect and the intermediate demand scale effect were greater than the negative effects of the carbon emissions strength effect. Therefore, the intermediate demand embodied carbon emissions transferred from the commercial and transportation industries in other regions to Shanxi increased during 2007-2012.
The final demand scale effect and the input-output structure effect increased the final demand embodied carbon emissions imported from other regions to Shanxi Province (see Fig. 7(b)). The carbon emissions strength effect had a great hindering effect on the final demand embodied carbon emissions imported from industries other regions into Shanxi, and the final demand structural effect increased the embodied carbon emissions of most industries in Shanxi. The industry with the largest increase in final demand embodied carbon emissions transferred from other regions to Shanxi was the construction industry during 2007-2012. The embodied carbon emissions strength effect reduced by 6.3106 million t, and the input-output structure effect, final demand structure effect and final demand scale effect increased the embodied carbon emissions by 11.775 million t. Therefore, the final demand embodied carbon emissions transferred from the construction industry in other regions to Shanxi increased by 5.4669 million t. The final demand embodied carbon emissions transferred from the machinery industry in other regions to Shanxi with the increasing of the final demand scale effect was as high as 168.8 million t, and the final demand carbon emissions embodied transferred from the machinery industry in other regions to Shanxi increased by 1.3587 million t during 2007-2012. The carbon emissions strength effect effectively reduced the final demand embodied carbon emissions transferred from the commercial and transportation industry in other regions to in Shanxi by 2.1329 million t during the study period. The increased embodied carbon emissions from input-output structure effect, final demand structure effect and final demand scale effect offset the reduced embodied carbon emissions from carbon emissions strength effect, so that the final demand embodied carbon emissions transferred from the commercial and transportation industry in other regions to Shanxi increased by 985,900 t during 2007-2012. The final demand embodied carbon emissions increased by final demand scale effect transferred from the electrical machinery and electronic communication equipment manufacturing industry in other regions to Shanxi was as high as 897,400 t, and the final demand embodied carbon emissions transferred from the electrical machinery and electronic communication equipment manufacturing industry in other regions to Shanxi increased during 2007-2012.
Additionally, the embodied carbon emissions transferred from other regions to Shanxi were mainly concentrated in the industries developing coal resources, which was closely related to the development of leading industries in this region. The embodied carbon emissions transferred from industries in other regions to Shanxi were promoted by the intermediate (final) demand scale effect and input-output structure effect, and hindered by the carbon emissions strength effect. The intermediate (final) demand structure effect played different roles in different industries. Therefore, it was necessary to focus on the development of leading industries of coal resources, and made reasonable adjustment and optimization of their economic production structure, final consumption and production technology to control the input of trade embodied carbon in Shanxi, and to reduce the embodied carbon emissions transferred from other regions during the Shanxi’s economic development.
4.4 Driving force effect of embodied SO2 emissions transferred from industries in other regions to Shanxi
The structural decomposition model was used to decompose the intermediate (final) demand embodied SO2 emissions transferred from other regions to Shanxi by the sulfur emissions strength effect, input-output structure effect, intermediate (final) demand structure effect and intermediate (final) demand scale effect. The driving factors transferred to the industries with more intermediate (final) demand SO2 emissions were analyzed (see Fig. 8).
The intermediate demand embodied SO2 emissions transferred from the construction industry, mining and selection industry, metal smelting and product industry, commerce and transportation industry in other regions to Shanxi were mainly concentrated (see Fig. 8(a)). The input-output structure effect, intermediate demand structure effect and intermediate demand scale effect increased the embodied SO2 emissions of the above industries. Only the sulfur emissions strength effect could hinder the increasing of embodied SO2 emissions. With the increasing of input-output structure effect, intermediate demand structure effect and intermediate demand scale effect, the intermediate demand embodied SO2 emissions transferred from the construction industry in other regions to Shanxi increased by 57,900 t, and then the intermediate demand embodied SO2 emissions transferred from the construction industry in other regions to Shanxi increased by 22,400 t during 2007-2012. The embodied SO2 emissions increased by the intermediate demand scale effect was the largest, which was as high as 38,300 t decomposing the influencing factors of the intermediate demand embodied SO2 emissions transferred from the mining industry in other regions to Shanxi. Therefore, the intermediate demand embodied SO2 emissions transferred to the construction industry in Shanxi increased the by 20,800 t during 2007-2012. The sulfur emissions strength effect effectively reduced the intermediate demand embodied SO2 emissions transferred from the metal smelting and product industry in other regions to Shanxi, and reduced the embodied SO2 emissions transferred by 35,600 t. Therefore, the intermediate demand embodied SO2 emissions transferred from the metal smelting and product industry in other regions to Shanxi increased by 8,700 t during 2007-2012. It was known that the embodied SO2 emissions increased by the intermediate demand scale effect was 10,200 t analyzing the intermediate demand embodied SO2 emissions transferred from the commercial and transportation industries in other regions to Shanxi. Therefore, the intermediate demand embodied SO2 emissions transferred from the commercial and transportation industries in other regions to Shanxi increased during 2007-2012.
The sulfur emissions strength effect played an important role in reducing the final demand embodied SO2 emissions from industries in other regions to Shanxi, the input-output structure effect and the final demand scale effect increased the final demand embodied SO2 emissions of various industries in Shanxi, and the final demand structure effect had a promoting effect on the increasing of embodied SO2 emissions in most industries in Shanxi (see Fig. 8(b)). The industry with the final demand embodied SO2 emissions transferred from in other regions to Shanxi was the construction industry. Because the increased embodied SO2 emissions from input-output structure effect, final demand structure effect and final demand scale effect offset the decreased embodied SO2 emissions from the sulfur emissions strength effect, the embodied SO2 emissions from the final demand transferred to the construction industry in Shanxi increased by 23,400 t during 2007-2012. The final demand structural effect was an influential factor that increased the final demand embodied SO2 emissions transferred from the machinery industry in other regions to Shanxi. The final demand embodied SO2 emissions transferred from the machinery industry in other regions to Shanxi was increased during the study period. The final demand structural effect could promote the reduction of the final demand embodied SO2 emissions transferred from the commercial and transportation industries in other regions to Shanxi. Therefore, the final demand embodied SO2 emissions transferred from the commercial and transportation industries in other regions to Shanxi only increased by 3,600 t during 2007-2012. The final demand structural effect had a significant contribution to the increasing of the final demand embodied SO2 emissions transferred from the electrical machinery and electronic communication equipment manufacturing industry in other regions to Shanxi during the study period, and the final demand embodied SO2 emissions transferred from the electrical machinery and electronic communication equipment manufacturing industry in other regions to Shanxi increased.
In conclusion, the major industries with embodied SO2 emissions transferred from other regions to Shanxi were extremely related to the mining and use of coal resources. The intermediate (final) demand scale effect and input-output structure effect were the influencing factors to increasing the embodied SO2 emissions in trade in Shanxi. Additionally, the carbon emissions strength effect had negative effect, while the intermediate (final) structure effect had positive effect for most industries in Shanxi. Therefore, the proportion of clean energy used, the industrial structure adjusted, production technology improved were needed to increase. Additionally, the consumption scale, production structure and input technology needed to be reduced. Therefore, it was meaningful to effectively control the embodied SO2 emissions transferred from other regions to Shanxi through trade activities.