Trends in ambient air pollution levels and PM_2.5 chemical compositions in four Chinese cities from 1995 to 2017.

ABSTRACT: An in-depth analysis of the specific evolution of air pollution in a given city can provide a better understanding of the chronic effects of air pollution on human health. In this study, we reported trends in ambient concentrations of particulate matter (PM) and gaseous pollutants [sulfur dioxide (SO₂), nitrogen dioxide (NO₂), and ozone (O₃)] from 1995 to 2017 and PM_2.5 composition for the period of 2000-2017 in Guangzhou, Wuhan, Chongqing, and Lanzhou. We provided socio-economic indicators to help explain the pollution trends. SO₂ and PM (including PM₁₀ and PM_2.5) concentrations showed a downward trend in recent years with the most notable reduction in SO₂ in Chongqing and PM_2.5 in Guangzhou

SUBMITTER: Yin Z 

PROVIDER: S-EPMC7656343 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature