Figure 6
From: Spatial and temporal variations of air quality and six air pollutants in China during 2015–2017

Regional differences in annual mean CO concentration (mg/m3) over mainland China between 2017 and 2015.
From: Spatial and temporal variations of air quality and six air pollutants in China during 2015–2017

Regional differences in annual mean CO concentration (mg/m3) over mainland China between 2017 and 2015.