In her Dec. 8 WorldNetDaily column, serial hater Janet Porter asserts that Al Gore said in his documentary "An Inconvenient Truth that "The polar ice caps will melt sending 20-plus-foot flood waves into coastal cities worldwide." Porter added: "The problem with Gore's theory, as explained by another guest on my F2A program yesterday, is something called the 'Archimedes Principle: when a less dense solid like ice melts in a liquid like water, the liquid level drops.'"
But Gore didn't claim what Porter claims he did. He was speaking specifically about ice shelfs in Antarctica and Greenland, which sit on land. If they were to melt or slide off the land into the sea, they would indeed contribute to rising sea levels since they would be an addition to the sea and not merely displacing ice with water.
All of which makes Porter's "little science experiment" regarding melting ice cubes in a water glass rather meaningless since, to replicate what Gore was actually talking about, she would have to add more ice cubes to her glass.