Via 150 signed articles, this volume, Green Cities, in the SAGE Reference Series on Green Society, provides an overview of the key concepts that urban planners, policy makers, and architects, engineers, and developers use to understand the sustainability dimensions of the urban environment. It identifies cities that have taken steps to become greener and discusses the strategies they have used. It reviews broad concepts associated with green cities. It discusses technologies, infrastructures, and programs that contribute to the greening of cities. Cities face enormous environmental challenges, and the entries in this volume, from case studies of greener cities to discussions of green urban design, infrastructure, and processes, can help us transform out cities into healthier, sustainable communities in which a growing urban population can thrive. Along with the articles, pedagogical elements of this electronic product include a Reader's Guide, Chronology, Resource Guide, Glossary, Appendix, and thorough Index.