NO 2 also exhibited a decreasing trend in 2020 and its concentration was reduced by 59% (15 μg/m 3 ) ( Fig. 4 ).
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SARS-CoV-2 pandemic lockdown: Effects on air quality in the industrialized Gujarat state of India.
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NO 2 also exhibited a decreasing trend in 2020 and its concentration was reduced by 59% (15 μg/m 3 ) ( Fig. 4 ).