The walls of our cities are becoming canvases for creative expression in the hands of a new generation of artists. These kids are street-smart and engaged. (And, OK, they're not all kids.) They work, on some levels, in the same spirit as Occupy Wall Street, reclaiming and transforming the urban landscape, and infusing their art with social and environmental consciousness. "Street art is showing that there can be these locations and public spaces that are temporarily taken over with artwork -- spaces we would traditionally think of as non-art space," says Martin Irvine, an associate professor at Georgetown University. Irvine has …
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Greg Hanscom is a senior editor at Grist. He tweets about cities, bikes, transportation, policy, and sustainability at @ghanscom.