Slide show with commentary about the high rise in Chicago and how this was the city to watch for the 20th Century and how cities might re-assess their need to build up as a traditional CBD. Helps to establish the idea of a CBD based on building height with Bid Rent and Burgess.
[Submitted by Chris Stephenson]
Trace the past and future expansion of the world's biggest cities with the BBCs interactive map (urbanisation and urban growth)
The world in 2050: leading experts give their forecasts for the urban future
Making cities work: Detroit, Mexico City, Moscow and China
Rural to urban migrants speak out.