Extended Data Fig. 7: Spatial distribution of the RPAE and RP of PM2.5 emissions in the Beijing-Tianjin-Hebei (BTH) region in China in 2021.
From: Control of toxicity of fine particulate matter emissions in China

a, RPAEOS (resolution: 9 km × 9 km). b, RPOS. c, RPAECT. d, RPCT. The base map is from the Standard Map Service System hosted by the Ministry of Natural Resources of China.