The number of urban dwellers is expected to hit 5 billion globally by 2025--double the number of 1990, according to studies by the World Resource Institute. As it turns out, many people just like city life, and telecommuting opportunities are limited: Doing business still requires face time. Here's a look at the likely candidates for 2025's 10 biggest.
Sources: World Resources Institute; United Nations. Note: All population figures for the metropolitan area, not just the central city.
10 Biggest Cities of the Future
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