Impact of the COVID-19 lockdown on roadside traffic-related air pollution in Shanghai, China.

Build Environ · 2021 · PMC7891056 · PMID 33633432

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a decreasing trendno p-value reported

In general, the concentrations of NO 2 followed a decreasing trend under the different lockdown measures during the COVID-19 pandemic at all stations (even with the same time span in 2018–2019), could be a result of the higher atmospheric mixing height in the warmer months of the year, which leads to lower concentration of air pollutants.

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