Sea Level Rise!
Sea level has been stable, at current levels, throughout recorded history for 5,000 years. That’s about to change. Still, it’s very difficult for people to imagine a change in sea level after 5,000 years of rock solid stability.
Nevertheless, assuming sea levels do rise markedly, one of the biggest questions of the century is whether the world is prepared for sea level rise?
As a guess, the answer is: No, not even close.