Study On The Transfer And Driving Forces Of Air Pollution Emissions Embodied In Different Trades Within China

Industrial production and emissions are the main cause of air pollution.Trade is a main driver of regional production,transforming the production and emissions from consumption regions to production regions,thus changing the temporal and spatial distribution characteristics of air pollutant emissions.Studying on the transfer and driving forces of air pollution emissions embodied in different trades within China is of great significance for the formulation of air pollutant emission reduction decisions from a macroeconomic perspective.Based on the air pollutant emission decomposition method,multi-regional input-output model and LMDI method,this study analyzed the transfer emissions of four air pollutants?SO₂,NO_x,Soot and Dust?in different trade patterns within China,and revealed the spatial distribution characteristics.Finally,the driving forces behind the emission of air pollutants and the impact of different trade patterns on the environment were discussed.Three different trade patterns are trade of final products?T_f?,trade of intermediate products for the last stage of production?T_i?and trade for the global and domestic value chain?T_v?.Results showed that:?1?Domestic inter-regional trade?38-47%?dominated the transfer of air pollutants in China.The main cause of air pollutant emissions was the transfer of intermediate products?including T_i and T_v?.The trade of intermediate products from inland regions to coastal regions in China contributed to additional air pollutant emissions thereby being in line with the pollution haven hypothesis,i.e.a shifting of pollution-intensive industry from countries with stringent environmental regulations to countries with weaker environmental regulations.The largest share of embodied air pollutants was from T_v trade pattern?18-46%?,which meant spatial production fragmentation had become a key factor to affect embodied emissions flows.?2?In 2012,the provinces with more air pollutant emissions in China were mainly in Shandong,Henan and North China.The sectors with more air pollutant emissions were electricity and heat production and supply,non-metallic mineral products,metal smelting and rolling processing.The regions with high total emissions embodied in export of air pollutants were mainly in the southeastern coastal provinces with more developed economies and the provinces of heavy industry and energy supply.The energy industry?2-58%?,basic industry?10-92%?and light industry?1-38%?accounted for a relatively high proportion of emissions embodied in export.?3?The difference in emission intensity in China's region was more important than the change in domestic inter-regional trade volume in promoting the air pollutants embodied emissions.The different impacts of three different trade patterns on the environment were as follows:T_f and T_i was conducive to national emissions reduction,while T_v trade increased national emissions and have a greater impact.The above research results can provide ideas for trade policy and ecological compensation policy in regional air pollution control,and provide useful reference for other countries to analyze the environmental impact of domestic trade.It provide reference for realizing regional air pollution collaborative management,thus effectively improving air quality in contaminated areas.