Related Experiment Video
Updated: Apr 7, 2026
Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters
Published on: July 12, 2024
City as a major source area of fine particulate (PM2.5) in China
Lijian Han1, Weiqi Zhou1, Weifeng Li1
1State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Abstract:
The PM2.5 concentration in 31% of China's territorial areas was less than 10 μg/m(3), and in 26% of China's territorial areas was higher than 35 μg/m(3). High concentrations of PM2.5 were found in the East China Plain, Sichuan province, and the Taklimakan desert. East China Plain was also found with strong significant positive trends. 73% of artificial surface (L01) was found with significant positive trends, but only 2% with significant negative trends. 76% of cropland (L02) was observed with significant positive trends, but only 2% with significant negative trends. The mean significant trends of PM2.5 concentration were 1.81 μg/m(3)·year for L01 and 1.71 μg/m(3)·year for L02, higher than that for the rest land covers. The PM2.5 pollution brought potential health risk to susceptible population: only 1% of thm lives at a safe level (<10 μg/m(3)), but 69% of them were exposed to heavy PM2.5 pollution (>35 μg/m(3)).
