Deforestation towel dispenser

Inhabitat finds an ingenious ad campaign by the World Wildlife Federation:

These paper towel dispensers have a cut out the shape of South America through which a stack of green paper towels illustrates the green rain forest canopy of the continent. As the paper towel dispenser is slowly drained of its green paper towels, we see the greenness slowly drained out of South America, symbolizing the nasty environmental impact of disposable paper towels.

Click through to see billboards situated to cast a shadow as the day progresses, indicating the rate of sea-level change due to global warming.