Ozone (O3) in the troposphere is an air pollutant and a greenhouse gas. In mainland China,
after the Air Pollution Prevention and Action Plan was implemented in 2013—and despite …

Nitrogen oxides (NO x= NO+ NO 2) are key precursors of tropospheric ozone (O 3) together
with volatile organic compounds (VOC) and carbon monoxide (CO). Since O 3 has positive …

The atmospheric oxidizing capacity (AOC), reflecting the self-cleansing capacity of the
atmosphere, plays an important role in the chemical evolution of secondary fine particulate …

Abstract Background Coronavirus disease 2019 (COVID-19) pandemic provided an
opportunity for the environment to reduce ambient pollution despite the economic, social …

In recent years, the issue of PM 2.5-O 3 compound pollution has become a significant global
environmental concern. This study examines the spatial and temporal patterns of global PM …

Abstract In Great Britain, limited studies have employed machine learning methods to predict
air pollution especially ozone (O 3) with high spatiotemporal resolution. This study aimed to …

The coordinated control of PM 2.5 and ozone has become the strategic goal of national air
pollution control. Considering the gradual decline in PM 2.5 concentration and the …

PM 2.5 concentrations have dramatically reduced in key regions of China during the period
2013–2017, while O 3 has increased. Hence there is an urgent demand to develop a …

China is facing dual pressures to reduce both PM2. 5 and O3 pollution, the crucial
precursors of which are NO x and VOCs. In our study, the role of NO x in both secondary …

This study presents the measurement of photochemical precursors during the lockdown
period from January 23, 2020, to March 14, 2020, in Chengdu in response to the …