Read here. Neither Al Gore or James Hansen is an expert regarding oceans and seas. And they are definitely not experts regarding sea level rises. Sooo, what do the real, human scientist experts (not computer models) think about future sea level rises?
The experts in seas/oceans estimate a potential 4.7 inch to 39 inch rise over 21st century - this is certainly a sea level rise range that humans can deal with, easily. And, most significantly, this is a range based on historical sea levels that actually occurred during past warmer periods. What does this tell us? The true experts are predicting a maximum sea level rise far below the non-expert opinions (propagandist myths) of fanatical warming activists, such as Gore and Hansen.
"In an effort to place some reasonable potential limits (both high and low) on possible future sea-level rise, members of the PALeo SEA Level Working Group (PALSEA) recently looked to the past for some answers....The PALSEA scientists say that "using palaeo-data and direct observations, it is possible to put loose limits on just how rapidly we might expect sea-level rise to occur over the next century" if the worst-case warming scenario of the IPCC were actually to occur, placing the projected rise somewhere between the lower limit of 20th-century sea-level rise (0.12 m per century [4.7 inches]) and the sea-level rise at the conclusion of the termination of the last glacial period (1 m per century [39 inches])."