In our peak oil, post-Katrina world, how do America's largest cities stack up in terms of sustainability? Which cities are more self-sufficient and better-prepared for our uncertain future, and which cities are operating business-as-usual? How Green is Your City? examines the outcome of a sustainability study of the 50 largest U.S. cities, compiled by SustainLane. The 2006 SustainLane US Cities Rankings employed 15 standards to measure each city's performance and ranked them overall according to the cumulative results. Among those standards: Public transit use Air and tap water quality Planning/land use City innovation Affordability Energy/climate change policy Local food/agriculture Green economy Sustainability management Leading the pack is Portland, Oregon, with its high quality of life and commitment to green building, local food, alternative fuels and renewable energy, while Columbus, Ohio, with its dependence on the automobile and poor public transit, ranks at the bottom. How Green is Your City? offers an in-depth analysis of each city's management policies, strengths and challenges, as well as the emerging job and tax base expansion opportunities with the growth of clean technologies. How Green is Your City? will appeal to city planners, legislators, green businesses, as well as anyone interested in their quality of life and making their city a more sustainable place. SustainLane.us was designed as an online open-source knowledge base devoted to government officials, while Sustainlane.com is for reviews in the green and healthy product market. Author Warren Karlenzig, along with Frank Marquardt, Paula White, Rachel Yaseen and Richard Young of SustainLane.com contributed to this project.