Reduced Air Pollution during the Prevailing of COVID-19 Pandemic: Five Years Observation and Path Analysis in the Fenwei Plain, Northwest China

<div>Comparison of the concentration trends of PM2.5, NO2, SO2, CO, and O3 in 2020 and the historical concentration trends (2016–2019). PRF represents the prelockdown period; CNYF represents the Chinese New Year.</div>

Advances in Meteorology

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Figure 4

Figure 4: Reduced Air Pollution during the Prevailing of COVID-19 Pandemic: Five Years Observation and Path Analysis in the Fenwei Plain, Northwest China 

Figure 4 | Reduced Air Pollution during the Prevailing of COVID-19 Pandemic: Five Years Observation and Path Analysis in the Fenwei Plain, Northwest China 