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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. 5 — Time series of daily PM_2.5 estimates (red) at the nearest prediction locations (centroid of census tract, ZIP code, or county) near daily PM_2.5 monitoring observations (black) for Seattle, WA, Portland, OR, and Boise, ID using the 2008–2018 models (with RMSE and R² values for that location).