The Linkage Effects Of China's Construction Industry And International Comparison Analysis Based On MRIO Model

In recent years,global warming has been a common concern to all countries.China,as the world's biggest carbon emitter,faces enormous pressure and responsibility to reduce carbon emissions.With the rapid development of economy and the acceleration of urbanization,the problem of high energy consumption and high emission in construction industry is becoming more and more prominent and50%of the total energy consumption is closely related to the construction industry.Therefore,the construction industry has become the key control object of carbon emission reduction.This paper studies the linkage of construction CO₂ emissions from two points of view between industry and country,then,predict the trend of carbon emission in construction industry and allocate responsibility of carbon emission reduction to various industrial sectors.Based on the experience of emission reduction in typical countries,the carbon emission reduction measures suitable for China's construction industry are put forward.The main research content and results are as follows:First,building a multi area input-output model,the carbon emission status of China's construction industry is analyzed from three aspects:carbon emission intensity,direct carbon emission and implicit carbon emission.The results of the study show that:the carbon emission intensity of construction industry is decreasing,and the direct carbon emissions of construction industry show an increasing trend.However,the direct carbon emissions generated by the construction industry share a relatively small proportion in the total industry sector.Nevertheless,the embodied carbon emissions from the construction industry are the first in all industrial sectors and have a growing trend.Second,based on the improved hypothesis extraction method,combined with the relevant carbon correlation index,we compare the carbon correlation between Chinese construction industry from two angles of industry and country,and find the carbon correlation relationship between China's construction industry and the gap with typical countries.The research results show that the carbon related effect of China's construction industry is similar to that of Russia and Indonesia,it is mainly related to the second industry based on energy consumption.While,in the United States,Japan and Germany,the construction industry is more closely related to the third industry,such as transportation.Third,based on the renewal gray GM?1,1?model,the embodied carbon emissions of China's construction industry and the total industry sector were predicted under the three situations of pessimism,medium and optimism,and the responsibility of emission reduction was allocated to various industrial sectors.The results show that,under the pessimistic situation,for completing the emission reduction target,the allowed embodied carbon emissions of construction industry is 4007512.39 kt to4242199.22 kt.The carbon emissions generated by the construction industry are less,and the carbon emissions are mainly from the carbon emissions transferred from other industrial sectors to the construction industry.In the middle of the case,for completing the emission reduction targets,the allowed embodied carbon emissions of construction industry is 354379.53 kt to 4589066.36 kt.In the optimistic situation,the construction industry can successfully achieve the target of emission reduction.Finally,based on the research results and the experience of carbon emission reduction in typical countries,relevant countermeasures and measures are put forward for the carbon emission reduction of China's construction industry:Improving energy efficiency;Promote the optimization and upgrading of industrial structure;Improve the policy system for reducing greenhouse gas emissions.