The Urban Forest Project.

185 banners about trees will hang from lampposts in New York’s Times Square for the next two months. Professional designers, artists, and students were invited to contribute designs “using the form of the tree, or a metaphor for the tree.... Following their display, the banners will be recycled into tote bags and sold at auction, with proceeds going to scholarship and mentoring programs that benefit students of the visual arts.” Though it was not explicitly part of the brief, a large number of designers took the opportunity to publish social commentary. The direct link to the banners has disappeared from the main site, but you can click through images of all the banners here.