Millions of people, from Bangladesh to Florida and some Pacific island states, live less than a meter above sea level. Most of the world's major cities, from Shanghai to Buenos Aires, are by the sea.

Chris Rapley, the outgoing head of the British Antarctic Survey, said there were worrying signs of accelerating flows of ice towards the ocean from both Antarctica and Greenland with little sign of more snow falling inland to compensate.

 Source : Reuters Enviroment