The video above explains a method of creating art developed by the Sao Paulo based artist Alexandre Orion. He calls them “Pollugraphies”. The technique captures the soot directly from car exhaust pipes to produce images on canvas. Each piece is exposed to the pollution for a week. If the truck shakes hard, the piece gets damaged. If it rains, the piece is gone. Orion produces an average of 4 pieces to save only one.