Substantial changes in Gaseous pollutants and health effects during COVID-19 in Delhi, India.

PeerJ · 2023 · PMC9835704 · PMID 36643637

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an increasing trendno p-value reported

In contrast, the unlockdown period showed an increasing trend in the order of unlockdown I > unlockdown II > unlockdown III > unlockdown IV, respectively, except O 3 .

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a slightly increasing trendno p-value reported

In contrast with the absence of dissociation factors (NO and NO2) in the ambient atmosphere, ozone levels at all stations showed a slightly increasing trend during the lockdown period, similar to those during the pre-lockdown period ( Dhaka et al., 2020 ).

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