Reactive nitrogen chemistry in aerosol water as a source of sulfate during haze events in China.

Sci Adv · 2016 · PMC5176349 · PMID 28028539

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an increasing trendno p-value reported

However, contribution from secondary inorganic species (such as sulfate and nitrate) showed an increasing trend with increasing pollution levels, whereas contribution from organics decreased ( 5 ).

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