psycho-(wheatpasties)

Street art is any art developed in public spaces.
The motivations and objectives that drive street artists are as varied as the artists themselves. There is a strong current of activism and subversion in urban art. Street art can be a powerful platform for reaching the public, and frequent themes include adbusting, subvertising and other culture jamming, the abolishment of private property and reclaiming the streets.

http://en.wikipedia.org/wiki/Street_art
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