Comparative Analysis of Long-Term Variation Characteristics of SO2, NO2, and O3 in the Ecological and Economic Zones of the Western Sichuan Plateau, Southwest China.

Int J Environ Res Public Health · 2019 · PMC6765819 · PMID 31491942

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an increasing trendno p-value reported

[ 28 ] reported an increasing trend of surface O 3 in a rural site north of eastern China and indicated that meteorological factors had little influence on long-term O 3 change, which was completely related to emissions.

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showed a trendno p-value reported

SO 2 and NO 2 in Liangshan showed a trend of first rising and then falling before and after 2012, and the decline of SO 2 was particularly significant after 2012.

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a decreasing trendno p-value reported

SO 2 /NO 2 in the economic zone of Western Sichuan Plateau showed a decreasing trend, while in the relatively clean ecological zone this ratio showed an increasing trend.

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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.

Comparative Analysis of Long-Term Variation Characteristics of SO<sub>2</sub>, NO<sub>2</sub>, and O<sub>3</sub> in the Ecological and Economic Zones of the Western Sichuan Plateau, Southwest China.

The sentences