Response of major air pollutants to COVID-19 lockdowns in China.

Sci Total Environ · 2020 · PMC7351666 · PMID 32758857

Europe PMC DOI

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a decreasing trendno p-value reported

The difference in O 3 concentration trends between the two cities is that Guangzhou's O 3 concentrations exhibited a decreasing trend from P2, while Wuhan's O 3 concentrations increased rapidly during the first week of the lockdown and then began to decline gradually.

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