Tracking industry pollution sources and health risks in China

Area of Science:

• Environmental Science
• Public Health
• Economics

Background:

• Industrial agglomeration intensifies pollution, leading to adverse public health outcomes.
• Tracking pollution at the source is crucial for understanding environmental hazards.
• Historical neglect of industrial pollution mitigation in China's Eastern and Central regions.

Purpose of the Study:

• To develop pollution emission indices using firm-level data in China.
• To analyze trends and spatial variations in pollution emission intensities.
• To assess the impact of pollution controls and their link to public health issues.

Main Methods:

• Development of constant-quality pollutant emission indices for wastewater discharge, Chemical Oxygen Demand (COD), and sulfur dioxide (SO2).
• Utilizing firm-level pollutant emission data from China (1998-2012).
• Application of locally weighted regression and creation of pollution emission heatmaps.

Main Results:

• Pollution emission indices for wastewater, COD, and SO2 showed decreasing trends from 1998 to 2012.
• Significant spatial clustering and regional variations in pollution emission trends were observed.
• Tightening pollution controls during China's 10th and 11th Five-Year Plans demonstrated effectiveness.

Conclusions:

• Failure to control pollution at the source has severe health consequences, potentially linked to 'cancer villages'.
• Strict and uniform pollution controls with clear emission limits are necessary to mitigate environmental hazards.
• Addressing pollution at the source can eliminate free-rider problems among polluting firms.