By 2050 most of the world will live in cities, a shift that will influence culture, investment, and policy. Here are the top spots for projected growth, according to the London-based City Mayors Foundation, which studies urban affairs:
Sources: City mayors, Hong Kong Trade Development Council, US Department of State, websites of cities
Afghan men sell vegetables and peppers along a street as they wait for customers in Kabul December 5.
Omar Sobhani/Reuters
This seaport city of about 1.5 million people in the Guangxi Zhuang Autonomous Region leads growth projections at more than 10 percent annually.