Environmental organization Greenpeace is looking for hundreds of men and women to strip-off their clothes on July 18 and 19, 2007. The volunteer nude models will pose on a Swiss glacier for world renown nude photographer Spencer Tunick, as part of a publicity campaign to raise awareness about global warming. It’s estimated that the world’s glaciers will all have melted well before the end of this century, raising sea levels to the point where many heavily populated coastal areas of the world will disappear.