Greenland has about 7 metre potential sea level rise equivalent in ice sheets (which is mildly astonishing given the size of the island) and Antarctica has abou

Greenland has about 7 metre potential sea level rise equivalent in ice sheets (which is mildly astonishing given the size of the island) and Antarctica has about 60 metres. But even a couple of metres spells disaster for most coastal cities, and the 600mm projected rise over the next 80 years increasingly looks to be unduly optimistic.