books.google.com.pk - With chapters by some of the most thoughtful international urban environmental scholars ... [and] many concrete examples from around the world this volume advances the science by addressing issues of scale in both its meanings; the geographical scale of environmental interactions as well as the difficulties...http://books.google.com.pk/books/about/Scaling_Urban_Environmental_Challenges.html?id=mnE2qC3A12cC&utm_source=gb-gplus-shareScaling Urban Environmental Challenges