March 22 was World Water Day, and TreeHugger posted this graphic on drinking water that is available in the world. The main point is that a very small percentage of water in the world is actually drinkable. It's definitely a story worth telling, but the graphic doesn't work at all. Even as a simple presentation of percentages (from UN-Water Statistics), it's confusing.
How can we improve this graphic to tell the story more clearly? Discuss.