Greenbuild 2009 will be hosted in Phoenix, Arizona, the fifth largest city in the country, and a thriving capital in the heart of the American Southwest. Phoenix’s unique environmental and social characteristics speak to the diversity of the United States and the imperative of Greenbuild 2009: Green building can and must come home to all people, boosting the quality of life across the country and around the world. a region with unique environmental and social challenges and opportunities, and the imperative is clear: Green building can and must come home to all people, boosting the quality of life on main streets across the country and around the world.