This powerful thought provoking advert was designed by CLM BBDO in Paris, France,  for the Nicholas Hulot Foundation. The foundation is an environmentalist group that was created in 1990. The ad was taken from the famous image of the second plane crashing into the world trade center, and was photoshopped to replace the skyscrapers with trees. Really cool idea. The full size advert can be found here. On a side note, heres another cool ad by Corbis that also draws on the 9/11 event. [adsoftheworld]