Characteristics and sources of atmospheric pollutants in typical inland cities in arid regions of central Asia: A case study of Urumqi city.

PLoS One · 2021 · PMC8057588 · PMID 33878117

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a decreasing trendno p-value reported

During our study period, the interannual and seasonal variations of PM 2.5 , PM 10 , SO 2 , CO, and NO 2 concentrations showed a decreasing trend, and the variation of SO 2 concentrations was the most obviously (Figs 2 and 3 ).

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