Global warming is the hottest topic now and with meet at Copenhagen every body around the world has become more aware. Global Flood Map is an online tool which lets you find which areas would be flooded or at risk by changing the value of sea level i.e. You can enter 3 inches and then find how it will affect the world.
You can also find according to city and see how much effect can take place and how many people might have to get relocated because the sea level rise. Check out Global Flood Map