via Nik Freeman.
Using statistics from the 2010 U.S. Census Bureau, the map uses green to color in census blocks with no reported residents.
The United States consists of 11,078,300 Census Blocks. However, of them, 4,871,270 blocks totaling 4.61 million square kilometers were reported to have no population living inside them. Despite having a population of more than 310 million people, 47% of the USA remains unoccupied.
Most of the green shading highlights areas where human habitation is either restrictive (lakes, rivers, floodplains, mountains, etc) or prohibited by social or legal convention (wilderness protected states, recreational areas such as state parks, and more).
Certainly a different view of things. It is interesting to see where people aren't ... (and a little surprising too).