A United Nations report on urban population trends makes for powerful, moving, often-depressing, sometimes-hopeful reading. The chief conclusion:
In 2008, for the first time in history, more than half of world population, 3.3 billion people, will be living in urban areas. This number is expected to swell to almost 5 billion by 2030. In Africa and Asia, the urban population will double between 2000 and 2030. Many of these new urbanites will be poor. Their future, the future of cities in developing countries, the future of humanity itself, all depend very much on decisions made now.