Global and Geographically and Temporally Weighted Regression Models for Modeling PM<sub>2.5</sub> in Heilongjiang, China from 2015 to 2018.

Int J Environ Res Public Health · 2019 · PMC6950195 · PMID 31847317

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a decreasing trendno p-value reported

Fortunately, the annual concentration of PM 2.5 from 2015 to 2018 presented a decreasing trend in most cities, except Jixi ( Figure 7 ).

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