Greenpeace activists and Planet Streetpainting artists teamed up to create this amazing optical illusion at the World Fashion Centre in Amsterdam. The piece is bringing attention to hidden toxic chemicals in brands like Abercrombie & FitchCalvin Klein, and G-Star that get washed out during domestic laundry and pollute our waterways.  Interested in the details and which brands are the worst offenders?  Click ahead to learn more and find out what you can do to keep our water clean.