"Manmade Carbon Pollution Has Already Put Us On Track For 69 Feet Of Sea Level Rise"
The bad news is that were all but certain to end up with a coastline at least this flooded (20 meters or 69 feet):
The good news is that this might take 1000 to 2000 years (or longer), and the choices we make now can affect the rate of rise and whether we blow past 69 feet to beyond 200 feet.
This shouldnt be a surprise to anyone who follows the scientific literature. Just last year the National Science Foundation (NSF) reported on paleoclimate research that examined rock and soil cores taken in Virginia, New Zealand and the Eniwetok Atoll in the north Pacific Ocean. Lead author Kenneth Miller of Rutgers University said:
The natural state of the Earth with present carbon dioxide levels is one with sea levels about 70 feet higher than now.
http://thinkprogress.org/climate/2013/02/01/1527551/manmade-carbon-pollution-has-already-put-us-on-track-for-69-feet-of-sea-level-rise/
It may take a long time but Florida and Louisiana look to be in a world of hurt as the years go by.