The emergence of megacities over the last two decades has made it necessary to radically rethink the urbanization process. Vast urban agglomerations, the majority in developing countries and advancing economies, now home to over 50% of the world’s population, face immense economical, social and environmental challenges, but equally they generate opportunities in the these spheres [...]

This has been around a bit, but if you haven’t seen it, it’s pretty amazing as an example of the ingenuity of folks in the emerging megacities, where poverty and extreme density combine to generate all sorts of new possibilities.

via World Changing