 This figure comes from the U.S. government, from NOAA National Oceanographic and Atmospheric Administration, and all it does is show regions that will go underwater, shown by the reddish color, such as here, for various levels of sea level rise. And this is one meter of sea level rise over here on the left, and you see certain places that are starting to get a little bit damp. This is two meters of sea level rise, and you see big areas where a whole lot of people live are in trouble then, and this is four meters of sea level rise, and this one over here is eight meters of sea level rise, and you see really big areas getting wet. The worst case scenario that we can dream of is actually a good bit bigger than eight meters. Clearly, people could build walls to hold back the sea, the Netherlands has done it, it's been done around New Orleans with dykes, although those sometimes fail, but it gets expensive if you're trying to wall off that much of the coast, and so one suspects that if we head towards the worst cases, somewhere well out in the future, that it could become very expensive or we lose a lot of land.