In the summer months we often see images like this of field art. But this one is especially interesting in its complexity and purpose. Do you think it's effective?
An aerial view shows a labyrinth in the form of a cow that is cut into a field outside Berlin Sept. 2, 2009. The labyrinth was created by the Federal Institute of Risk Assessment to raise awareness for healthy eating and dangers from harmful substances in food as well as to explain the digestion process in the stomach of a cow.