Skip to main content
Environmental Sciences Europe
Fig. 6 | Environmental Sciences Europe

Fig. 6

From: Air quality index variation before and after the onset of COVID-19 pandemic: a comprehensive study on 87 capital, industrial and polluted cities of the world

Fig. 6

Box and whiskers plot depicting AQI variations for 87 cities in the World. The data show average of the first 4 months of 2018–2021 (January 1st–April 30th). A AQI-PM2.5 variation, B AQI-PM10 variation, C AQI-SO2 variation, D AQI-CO variation, C AQI-NO2 variation and C AQI-O3 variation. **P < 0.01, *P < 0.05, NA > 0.05

Back to article page