According to geographers’ estimates, two out of three people in the world will live in a city by the year 2030. This migration to urban centers creates an increase in urban populations, resulting in the formation of megacities. Geographers define a megacity as any city with a population of more than 10 million people. Today, there are 25 megacities in the world. Explore this resource on megacities, clicking through the interactive and reading about a few megacities in the world. Then pick two cities, research them, and create a profile about them. For each city, include the following information:

location
brief history of the city
population density
problems currently facing the city
what city planners are doing to address the city’s problems
what city planners could be doing differently