The Amazing Endurance of Slums - Richard Florida

By 2050, the world's urban population will swell to 6.25 billion, with 5.1 billion people living in cities in the developing world. Of these, as many as 2 billion people will live in slums.

Read the article at: http://www.citylab.com/work/2014/01/amazing-endurance-slums/8120/