Rapid urbanization is propelling growth across emerging markets and shifting the world’s economic balance toward the east and south. By 2025, it will create a “consumer class” with more than four billion people, up from a billion in 1990. Nearly half will live in the emerging world’s cities, which are set to inject almost $25 trillion into the global economy. Yet business leaders mostly ignore them. To learn about 440 largely obscure urban areas that will account for close to 50 percent of expected global GDP growth between 2010 and 2025, read “Unlocking the potential of emerging-market cities” (September 2012). Then browse through an interactive map to find city-specific highlights about these new economic hot spots.