(2007) The UN reveals that for the first time in history, more people now live in cities than rural areas.
North America is projected to grow at a much slower rate between now and 2050 – with the U.S. population rising from 303.9 million to 395 million.
While the world’s 20 mega-cities get a lot of attention, more than half of the urban world lives in cities of less 500,000 population.