2009: 1,000 ice sculptures melted under the Berlin sun, handcrafted by Brazilian artist Nele Azevedo, were set up in a public area by WWF Germany to show the direct effect of climate change in the Arctic on the whole planet and the future of humanity and nature. The sculptures began melting in 30 minutes. http://wwf.panda.org/?173563/Tiny-ice-figurines-draw-attention-to-big-problem
This is an excellent example of an ad because it uses a simple image but it is meaningful and recognizable to a large group of people. We could use basic graphics like this in mods to help show information.