Now they say that Boston may be threatened by rising sea levels – except that Boston is still growing itself by reclaiming land from the sea. And sea levels are not actually rising any faster than the rate they have been over the millennia of recovery from the last ice age. Just as arctic ice seems to be quite “normal” while antarctic ice cover is on the high side.
The marshland that has been filled in to allow Boston to expand over the last 150 years is shown very nicely in this animation (from 2010) from Joost Bonsen at Maximising Progress.
The k2p blog 