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Air pollutant emissions induced by rural-to-urban migration during China's urbanization(2005-2015)

Environmental Science and Ecotechnology 2022年第2期10卷 45-53页

作者： Guang Shi Xi Lu Hongxia Zhang Haotian Zheng Zhonghua Zhang Shi Chen Jia Xing Shuxiao Wang State Key Joint Laboratory of Environment Simulation and Pollution Control and School of Environment Tsinghua UniversityBeijing100084PR China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084PR China Beijing Laboratory of Environmental Frontier Technologies Tsinghua UniversityBeijing100084PR China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084PR China School of Applied Economics Renmin University of ChinaBeijing100872PR China

As the world's most populous country,China has witnessed rapid urbanization in recent decades,with population migration from rural to urban(RU)regions as the major driving *** to the large gap between rural and urban consumption and investment level,large-scale RU migration impacts air pollutant emissions and creates extra uncertainties for air quality ***,we integrated population migration assessment,an environmentally extended inputeoutput model and structural decomposition analysis to evaluate the NOx,SO2 and primary PM2.5 emissions induced by RU migration during China's urbanization from 2005 to *** results show that RU migration increased air pollutant emissions,while the increases in NOx and SO2 emissions peaked in approximately 2010 at 2.4 Mt and 2.2 Mt,accounting for 9.2%and 8.7%of the national emissions,*** primary PM2.5 emissions induced by RU migration also peaked in approximately 2012 at 0.3 Mt,accounting for 2.8%of the national *** indirect emissions embodied in consumption and investment increased,while household direct emissions *** widening gap between urban and rural investment and consumption exerted a major increasing effect on migration-induced emissions;in contrast,the falling emission intensity contributed the most to the decreasing effect benefitting from end-of-pipe control technology applications as well as improving energy *** peak of air pollutant emissions induced by RU migration indicates that although urbanization currently creates extra environmental pressure in China,it is possible to reconcile urbanization and air quality improvement in the future with updating urbanization and air pollution control policies.

关键词： Urbanization Population migration Air pollutant emission reduction inputeoutput model Structural decomposition analysis

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