Discuss: Flowchart on drinkable water in the world
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.