Portland, Oregon Named Most Sustainable U.S. City

The nonprofit SustainLane.com has named Portland, Oregon, the most sustainable of the 50 largest cities in the U.S. Second and third went to San Francisco and Seattle, respectively, while Columbus, Ohio, was named least sustainable. The rankings were based on 13 factors: air quality, housing affordability, innovation, knowledge base and communications, green economy, energy and climate change policy, green building, local food and agriculture, natural disaster risk, planning and land use, solid waste diversion, tap-water quality, and transportation and commuting. To see how other cities fared and learn about the methodologies used to rank them, visit www.sustainlane.org.