Clean Tags

South Africa-based art collective Dutch Ink create truly eco-conscious art by using negative space as the positive. Instead of spraying paint on walls, the group takes stencils to dirty spaces and scrub clean within the shapes. The result is a series of "clean tags", revealing their work in the original color the space once was. Our favorite is this one, naturally - a flock of birds flying along a roadside wall.

Via Inhabitat. See more at Dutch Ink.