When we think of green building, we tend to picture new construction. But Robert Young argues that the greenest building is often the one that has already been built. In Stewardship of the Built Environment, he shows how rehabilitating and reusing existing structures holds untapped potential for achieving sustainable communities. Students and professionals alike will discover the multifaceted benefits of reuse. Young begins by describing how historic preservation, often overlooked because of the predominant focus on new construction, is actually an important sustainable design strategy. He then examines the social, environmental, and economic benefits of preservation - from the societal value of reusing existing buildings to financial incentives available for rehabilitation. Young concludes with insights into the future of reusing buildings as a sustainability strategy. He also provides several informative appendices, including a glossary of key terms and acronyms and recommendations for further reading. Readers will become familiar with essential terminology; sustainability and historic preservation metrics; and opportunities for smart growth afforded by rehabilitation. This knowledge is key to preserving the past while building a sustainable future.