Uh, you do know that sea level rises for several reasons, right? Thermal expansions. Oh and ice melt of glaciers and sea ice isn't linear. Why not read some peer reviewed science?
The difference between a two-foot rise in sea levels and ten feet is the difference between something we could realistically do something about, and an apocalyptic vision.
[1] http://www.mpimet.mpg.de/en/communication/climate-faq/how-mu...