The concentration of major air pollutants during the movement control order due to the COVID-19 pandemic in the Klang Valley, Malaysia.

Sustain Cities Soc · 2021 · PMC7833430 · PMID 33520606

Europe PMC DOI

hedged sentences

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closest p · 1.0× alpha

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boldest claim

The sentences

clearly significantlyp < 0.05actually significant

The daily concentrations of NO 2 and CO were clearly significantly reduced ( p < 0.05) after the MCO was implemented.

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a decreasing trendno p-value reported

Another study by Bao and Zhang (2020) reported that the reduction in air pollution in northern Chinese cities was significantly linked with the movement restrictions, as results showed a decreasing trend in air pollutants including NO 2 (24.67 %), particulate matter with an aerodynamic diameter smaller than 10 micrometres or PM 10 (13.66 %), SO 2 (6.76 %), PM 2.5 (5.93 %) and CO (4.58 %).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.