Understanding the industrial NOx and SO2 pollutant emissions in China from sector linkage perspective

Lanxin Zhang; Yuan Wang; Cuiyang Feng; Sai Liang; Yu Liu; Huibin Du; Ning Jia

doi:10.1016/j.scitotenv.2021.145242

Understanding the industrial NO_x and SO₂ pollutant emissions in China from sector linkage perspective

Sci Total Environ. 2021 May 20:770:145242. doi: 10.1016/j.scitotenv.2021.145242. Epub 2021 Jan 19.

Authors

Lanxin Zhang¹, Yuan Wang², Cuiyang Feng³, Sai Liang⁴, Yu Liu⁵, Huibin Du⁶, Ning Jia⁶

Affiliations

¹ School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
² School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China. Electronic address: wyuan@tju.edu.cn.
³ State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China. Electronic address: fengcuiyang@bnu.edu.cn.
⁴ Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China.
⁵ Institute of Science and Development, Chinese Academy of Sciences, Beijing 100190, China; School of Public Policy and Management, University of Chinese Academy of Sciences, Beijing 100049, China.
⁶ College of Management and Economics, Tianjin University, Tianjin 300072, China.

PMID: 33517018
DOI: 10.1016/j.scitotenv.2021.145242

Abstract

Since the most stringent-ever clean air policy was implemented in 2013 in China, main industrial air pollutant emissions have notably decreased. However, there are few studies on air pollutant emissions of industrial sectors driven by supply chain before and after implementing this policy. This paper attempts to provide a new perspective from industrial linkage to understand the emission of air pollutants. Based on Input-Output model framework, we revealed the linkages of SO₂ and NO_x emissions between sectors from 2012 to 2017 and the driving forces behind emission changes. Moreover, we simulated the possible impact of the key sector linkages on air pollutant emissions. Results show that the most noteworthy change during this period is that the metal melting sector has replaced the power sector, as the largest pollutant output emission sector associated with other sectors, especially the transport equipment sector. The main reason of this phenomena is that the emission intensity reduction rate of metal smelting sector (e.g., only 17% for NO_x) is far less than other sectors. In the future, the development of the equipment manufacturing may put pressure on the metal smelting sector to reduce emissions. For example, when the transport equipment sector increases total output by 20% ~ 40%, the metal smelting sector will be driven to emit 0.04Mt ~0.08Mt of NO_x. This paper provides a basis to quantitatively analyze the industrial sector linkages and identify the key sectors from 2012-2017, and helps decision makers better understand the impact of sector linkage on pollutant emissions.

Keywords: Air pollutant emissions; Hypothetical extraction method (HEM); Sector linkage; Structural decomposition analysis (SDA).