20 Amazing Things About Cities

1. Until 2025, over 60 % of the world's population of 8 billion will live in metropolises and cities. Over 90 urban centers will have populations of over 5 million of inhabitants (in 1950 just 5 such cities existed). In 1980, 22 cities had over 5 million inhabitants, 36 over 3 million, a... [ read more >> ]