Sea Rise
According to Nova, over the next 100 years, as the oceans warm, they will expand, raising the ocean level by about 33 cm (12.99 in). All the mountain glaciers will melt, raising it by another 33 cm (12.99 in). Much of the Greenland and Antarctic ice sheets will melt raising it by another 33 cm (12.99 in), for a total of 1 metre (3.28 ft). That does not sound like much until you consider that 100 million people will be flooded out. It will cost trillions to built coastal defences. There will be millions of refugees creating political turmoil. And that is the most optimistic scenario.
~ Roedy (1948-02-04 age:70)