New data from the U.S. Census Bureau show that more than 80% of Americans now live in urban areas, but the bureau's definition of "urban" is broader than one might expect. At the same time, urban areas are increasing in size; for example, Atlanta's urban area grew by almost 683 square miles between 2000 and 2010. "The suburbs are just growing outward. That seems to be the case in most of the larger areas," said Census Bureau geographer Kevin Hawley.
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