Contrasting trends of PM<sub>2.5</sub> and surface-ozone concentrations in China from 2013 to 2017.

Natl Sci Rev · 2020 · PMC8288972 · PMID 34692161

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a decreasing trendno p-value reported

[ 28 ] found that the solar-radiation intensity increased by 1.93 W m −2 per year between 2005 and 2015 in Beijing, while the PM 2.5 concentration showed a decreasing trend.

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