Assessing transboundary air pollution and joint prevention control policies: evidence from China

Abstract

This study addresses the pressing issue of transboundary air pollution, an environmental concern characterised by the dispersion of pollutants across administrative boundaries. Prior research in this area has lacked an in-depth examination of the efficacy of cooperative environmental policies in managing this challenge. To address this gap, our study first evaluates transboundary sulphur dioxide pollution across 31 provinces in China from 2005 to 2020 utilising the Hybrid Single-Particle Lagrangian Integrated Trajectory model. Following this, we apply a staggered Difference-in-Difference model to gauge the impact of the joint air pollution prevention and control policies adopted by China for high-priority provinces. Our analysis revealed an imbalance in emissions and transboundary pollution levels across provinces. Provinces such as Shandong, Shanxi, and Tianjin face the most severe transboundary SO2 pollution, whereas the highest SO2 emissions were noted in Shandong, Inner Mongolia, and Hebei. The implementation of the joint pollution prevention and control policy resulted in a significant reduction in SO2 emissions and transboundary SO2 pollution by factors of 10.60 and 9.70, respectively, when compared to other provinces. These findings provide valuable insights for shaping environmental cooperation policies and identifying priority provinces for mitigating air pollution.