keep San Francisco clean

Or just this bit here. And here. And clean up this side to make a tree.

Graffiti artist Moose uses sooty and dirty walls as his canvas, and "paints" his works by cleaning off the filth. It's called Reverse Graffiti, and it's quite beautiful.

Here's a three-minute documentary clip about the mural he made in SF's Broadway tunnel.



The Reverse Graffiti Project.