. . "fled rural areas of the Great Plains" . "Depopulation of the Great Plains" . . "Depopulation of the Great Plains" . . . . "Great Plains Exodus" . . . . . "depopulation of the rural Great Plains" . . "depopulation of the Great Plains" . . . "decline in population on the plains" . . "struggle to sustain their population" . "out-migration" . . . "de-population of rural areas" . "population has been falling" . "most notably the Great Plains" .