Calculation And Influencing Factors Of Embodied Carbon Emissions In ICT Sectors Based On Multi-regional Input-output

Environmental problems and energy crisis threaten the survival and development of mankind.While developing itself,Information and Communication Technology(ICT)can bring emission reduction contributions far beyond its own emissions.Through reasonable guidance,ICT will become an opportunity for the development of low-carbon economy.The study of ICT sector trade embodied carbon is helpful to understand the flow characteristics and dynamic trend of ICT sector carbon emissions,decompose and analyze the influencing factors of ICT sector trade embodied carbon emissions,and more clearly show the cause of the change of ICT sector trade embodied carbon emissions and the dynamic change process of the proportion of each influencing factor,so as to give suggestions on regional ICT sector trade carbon emission reduction.In this thesis,7 developed countries and 7 developing countries in the world input-output table are selected,and the ICT sector in the international standard industry classification is adopted.According to the multi-regional input-output model,the domestic ICT sector carbon emissions,international ICT trade carbon emissions and ICT sub-sector trade carbon emissions of the above 14 countries are calculated.The structural decomposition analysis model and two-level decomposition algorithm are used to carry out an empirical study on the three influencing factors of technology change,intermediate product structure change and final demand change of ICT sector trade embodied carbon emissions and their influence degrees.The results show that:(1)the specific carbon emissions of ICT sector and the total carbon emissions implied by trade are not high,and show an overall trend of decline.The export of information and communication technology products from developing countries to developed countries will lead to the increase of hidden carbon emissions,so that developed countries can achieve the target of carbon transfer,increasing the pressure of developing countries to reduce emissions.(2)Developed countries have more carbon emissions than developing countries in ICT sector domestic and trade,but with the rapid decline of ICT sector carbon emissions in developed countries,the gap between the two has gradually narrowed.(3)Carbon dioxide emitted by H1,as the only ICT manufacturing sector,accounts for nearly 90% of the ICT sector’s carbon emissions.However,with the rapid rise of ICT service sector,the proportion of implied carbon emissions from service trade in the overall sector is steadily increasing.(4)Technology level and final demand effect are the main factors affecting hidden carbon emissions,and the change of intermediate product structure is relatively small.For most countries,the positive effect of final demand on the increase of trade embodied carbon is the main reason for the increase of trade embodied carbon emissions in information and communication technology sector.The effect of technological change of carbon emission intensity is the most effective means to reduce the carbon implied by the trade of information and communication technology sector,and is also the starting point and focus of carbon emission reduction in various countries.