This title includes a number of Open Access chapters. Two trends come together in the world¿s cities to make urban sustainability a critical issue today. First, greater and greater numbers of people are living in urban areas¿and are projected to do so for the foreseeable future. Additionally, cities contribute to climate change in a significant way and must make systemic changes to mitigate and adapt to climate change effects. Urban planners face serious challenges in enhancing sustainability but also have an important set of tools available for creating innovative solutions. This book adds to the conversation about the place of urban planning in the creation and maintenance of sustainable cities.