碳排放权交易的减污降碳协同效应及影响机制

The synergistic effect of carbon emission trading on pollution and carbon reduction and the influence mechanism

减污降碳协同共治能够缓解我国环境质量改善和温室气体减排的双重压力。碳排放权交易是减碳的关键市场手段,厘清其对大气污染治理的协同作用至关重要。文中基于2006—2019年我国省级面板数据,使用双重差分法(DID)分析了碳排放权交易试点政策的协同作用,并通过中介效应模型检验了其影响机制。研究发现:碳交易试点具有显著的减污降碳协同效应,其中CO_(2)与SO_(2)的协同控制效果最显著,但政策效应的持续性有待增强;政策能通过降低能源消费量、改善能源结构这两条路径降低CO_(2)与大气污染物排放,但调整产业结构尚不存在该传导作用。为增强碳排放权交易的减污降碳协同效应,文中从加强碳交易监管力度、坚持能源消费提质降耗、扩大全国碳市场行业覆盖范围3个方面提出了政策建议。

The synergistic management of atmospheric pollutant and carbon emission can alleviate the dual pressure of improving environmental quality and reducing greenhouse gas emissions in China.It is crucial to clarify the synergy of carbon emissions trading,which is a key market-based instrument for carbon reduction.This paper examines the synergistic reduction effects of carbon emissions trading pilot policies on CO_(2),SO_(2),dust and PM2.5 using panel data of 30 provincial regions in China from 2006 to 2019 based on DID method,and explores the impact mechanism of the policies through mediating effects model.The results show that the policy has significant pollution and CO_(2)synergistic reduction effects,among which the synergistic effect of CO_(2)and SO_(2)is the most significant,but the long-term effects of the policy need to be enhanced.The mechanism analysis shows that carbon market can reduce CO_(2)and atmospheric pollutant by reducing energy consumption and adjusting energy structure,but the industrial structure does not have this transmission effect yet.In summary,this paper puts forward three suggestions:strengthen the supervision of carbon market and establish a sound long-term mechanism;insist on reducing energy consumption and optimizing energy structure;expand the range of industries covered by the national carbon market.