In 2008, the world reaches an invisible but momentous milestone: For the first time in history, more than half its human population, 3.3 billion people, will be living in urban areas. By 2030, this is expected to swell to almost 5 billion. Many of the 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 in preparation for this growth.
The present Report attempts to look beyond current problems, real, urgent and poignant though they are. Yet, it is also a call to action. The Report tries to grasp the implications of the imminent doubling of the developing world's urban population and discusses what needs to be done to prepare for this massive increase. It looks more closely at the demographic processes underlying urban growth in developing areas and their policy implications. It specifically examines the consequences of the urban transition for poverty reduction and sustainability.