
| These products were generated using censuses of population, housing, and agriculture: (top) change in population density; (middle) change in land area settled at "exurban densities" (i.e., 1 house per 1 to 40 acres); and (bottom) change in percentage of cropland. Credit: D.G. Brown, University of Michigan (reproduced from Ecological Applications with permission from the Ecological Society of America). |
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