Arizona's desert cities face many unique challenges associated with planning and achieving sustainability, particularly in urban areas. The downturn in the economy coupled with environmental changes and shifts in population and resources create unparalleled obstacles for local cities. What are communities doing to improve their livability in terms of social equity, environmental responsibility, and economic impact considering the current conditions? Rob Melnick, executive dean of the Global Institute of Sustainability, leads Tempe Mayor Mark Mitchell, Mesa Mayor Scott Smith, and Phoenix Mayor Greg Stanton in a discussion that addresses the challenges and opportunities that face their respective cities. The mayors' discussion was coordinated by ASU's Global Institute of Sustainability and the Sustainable Cities Network.