China coal Fig 1 (IMAGE) PNAS Nexus Caption Annual PM2.5 pollution in the Beijing-Tianjin-Hebei area from 2013 to 2018, showing a decreasing trend by year, especially in the southern area of Hebei Province. Credit Li et al Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.