Assessment of black carbon exposure level and health economic loss in China

Abstract

Based on GIS (Geographic Information System) software, applied the black carbon (BC)and ne particulate matter (PM 2.5 )concentration ratio method, this paper analyzed and calculated the national BC concentration distribution from 2015 to 2017, and evaluated the national human exposure of BC. The results show that from 2015 to 2017, 2/3 of the national land and nearly half of the population were exposed to the concentration range of 1-3 ug/m 3 , and the area and population exposed to the concentration below 2 ug/m 3 increased year by year, while the area and population exposed to the concentration above 9 ug/m 3 decreased year by year. The estimated results of economic loss show that 77.3% of the targeted districts or counties claimed a loss per square kilometer of 50 million RMB or less From the perspective of annual changes, districts and counties in Beijing-Tianjin-Hebei and Hunan with annual losses between 50 and 500 million RMB show an increasing trend. Meanwhile, the BC ratio (the proportion of black carbon economic loss to GDP) of Beijing-Tianjin-Hebei and Hunan also shows an increasing trend year by year.