Using data from the U.S. Census Bureau and the National Geographic Society’s Green Guide, the magazine evaluated 50 cities in four categories: electricity, transportation, green living and recycling / green perspective.
Portland, Ore., was number one, followed by San Francisco and Boston. Popular Science singled out Chicago for its 12,000 acres of parks and public green space; the city led the Midwest in the rankings, beating out Minneapolis (11) and Milwaukee (22).
Six cities got individual write-ups in the magazine for particularly sustainable urban design elements. Chicago’s (the second item in this slide show) described the cogeneration processes used in some city’s power plants.