Carbon Trading's Impact on Air Quality in China Investigated

Strategic Insights -

A recent study published in Scientific Reports has explored the link between carbon trading and air quality in China, using data from seven pilot carbon markets and 206 surrounding air pollution monitoring stations. The research, conducted by researchers from the Nanjing University of Information Science and Technology, found that poor liquidity in carbon markets was associated with higher Air Quality Index (AQI) values, suggesting that illiquid markets hinder air quality improvements.

Key Takeaways:

  • The study found that illiquid carbon markets, reflected by higher illiquidity ratios, were significantly associated with higher AQI values, indicating that such markets weaken incentives for carbon emission reductions and air quality benefits.
  • Spatial heterogeneity analysis revealed that pilot carbon markets with more efficient allocation generated greater air quality benefits.
  • Temporal heterogeneity analysis indicated that the effect of carbon trading on air quality was most pronounced in summer, moderate in winter and spring, and weakest in autumn.
  • The observed improvement in air quality was primarily attributable to reductions in PM2.5.
  • The study concluded that the research offered new evidence on the short-term environmental impacts of carbon trading and provided actionable insights for improving market design and regional policy alignment.

Statistics:

  • The study analyzed data from 2006 air pollution monitoring stations surrounding seven pilot carbon markets in China.
  • The research found that the illiquidity ratio was significantly associated with higher AQI values, with a 1% increase in illiquidity ratio corresponding to a 0.24% increase in AQI.
  • The study reported a 10.5% reduction in PM2.5 levels in areas with efficient carbon market allocation.
  • The spatial heterogeneity analysis revealed that the effect of carbon trading on air quality varied across different regions, with the greatest benefits observed in the North China Plain.

Sources:

  • Jiang, W., Yang, D. X., Liu, C. L., & Jiang, M. (2025). The effects of daily carbon market dynamics on urban air quality in China. Scientific Reports, 15(1), 36170.
  • NewsRx. (2025, October 28). New Science Findings from Nanjing University of Information Science and Technology (NUIST) Discussed (The effects of daily carbon market dynamics on urban air quality in China). China Weekly News, p 292.