What Greenpeace is characterized by is their complete ignorance of anything to do with basic science. Even if the temperature of the planet increased dramatically, the melting of the polar caps is limited by the available energy output of the sun received on the earth's surface. Given the hundreds of thousands of cubic kilometres of ice in Greenland alone, it takes a minimum of 9000 years to melt it all. For Antarctica, it's far longer. Water has a very high specific heat. Most absurd, they make ridiculous claims about the Arctic Ocean icepack, thereby demonstrating their ignorance of Archimedes principle. Melt floating ice and the change in surface level is zero.