Abstract
The study focusses on the variation of air quality assessed from mass concentrations of air pollutants in the year 2020 (particulate matter (PM2.5 and PM10), sulphur dioxide (SO2), nitrogen dioxide (NO2), carbon monoxide (CO) and ozone (O3)) amidst COVID–19 restrictions on firework activity during Diwali festive period in Visakhapatnam city. The results are compared with 2018 and 2019. The results indicate that the firework activity affected ambient air quality. The effect is lower in 2020 than in 2018 and even in 2019. In 2019, the effect is lower compared to 2018 due to the washout of pollutants caused by unusual rains on those days.
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