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. 2021 Apr 19;8:112. doi: 10.1038/s41597-021-00891-1

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© The Author(s) 2021

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Fig. 4 — Map of seasonal average predicted PM_2.5 by county for selected seasons using the 2008–2018 model. Winter = December, January, February; Spring = March, April, May; Summer = June, July, August; Fall = September, October, November.