Earlier this month, John posted an image showing how 98% of Australia's population is clustered in a few coastal regions. While that was fascinating, it turns out that America is pretty highly clustered as well. In fact,...
https://www.neatorama.com/2013/09/06/50-of-the-US-Population-Is-In-These-146-Counties/
50% of the US Population Is In These 146 Counties...
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