Yup. It's happened before: One metre every 20 years... As I was saying...


'When the planet moved from the last ice age to the present warm period  around fourteen thousand years ago there was a sudden increase in sea levels which amounted to twenty metres over four hundred years or, five metres  a century or, one metre every twenty years.'

And today...

'...six glaciers around Pine Island [Antarctica] ... the grounding line ... has been retreating towards the land at up to thirty five kilometres  (twenty two miles) a year. '

What price coastal properties now then?