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Figure 15--Forest Population Density Index (FPD) in (a) people per square mile (ppsm) of forest by county for 1992 and (b) change in FPD for 1992-2020. Sources: 1992 forestland use from the National Resource Inventory (USDA Natural Conservation Resource Service), 2000 forest use from the land use forecasting model described in Hardie and others (2000), population in 1992, Census of Population, and population in 2020 from county-level forecasts by Woods and Poole.

15a

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15b

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