Cool Green Cities: Smart Projects in Copenhagen, Portland, Paris & More

Impact

From a Day Without Cars and gardens atop shopping malls to a cloud forest in a major city, a look at smart projects from around the world.

Nina Strochlic

Updated Jul. 11, 2017 10:55PM ET / Published Jun. 02, 2013 4:45AM ET

Corbis (2), AP, Getty

Stan Honda/AFP/Getty

Stefano Amantini/Corbis

Don Ryan/AP

Fernando Vergara/AP

Khan Tariq Mikkel/Polfoto, via AP

Bertrand Gardel/Corbis

John Harper/Corbis