Did you know: For the first time in 2008 the world’s city dwellers outnumbered those in the countryside. The share of urbanites is projected to continue increasing, so that by 2030 some 60 percent of the world’s population will live in cities. For more information view the text and data in Chapter 6 of Plan B 4.0: Mobilizing to Save Civilization.
Lester Brown and Robert Engleman of Worldwatch Institute answer tough questions on population on MSNBC's Hardball with Chris Matthews. Posted July 22, 2011.