claim: In the 11,400 years since the end of the last Ice Age, sea  level has risen at an average of 4 feet / century, though it is now rising  much more slowly because very nearly all of the land-based ice that is  at low enough latitudes and altitudes to melt has long since gone.
evidence: For at least the last 100 years, sea level has been rising at an average rate of about 1.8 mm ( 0.07 in ) per year.