Rising tides signal an inarguable remaking of our physical world that is already underway and gaining momentum.
The US is especially vulnerable. The Organization for Economic Cooperation and Development has listed the 20 most threatened coastal cities in the world, which include Miami, New York, New Orleans.
One particularly influential contributor to sea level rise is the ice melt in Greenland.
Just two percent of Greenland is bare land, the rest is covered in ice — two miles thick in some places.