ABSTRACT
Sustainable urban development is a process which is ceaselessly dynamic, responding to changing economic, environmental and social pressures. Although there are relatively few universal principles for sustainability, the ways of moving from these to policy implementation are many. Sustainable urban development, therefore, is a process which will necessarily vary between cities, and which will evolve in different ways in each city. Indeed, the very notion of what constitutes a sustainable city will inevitably change over time, as our understanding of global and local environments becomes more sophisticated. One of the most profound challenges at present is to create viable, indeed sustainable, political and institutional systems within which strategies, programmes and policies for sustainable urban development can be framed.
