10. If the Ice Caps and Glaciers Melt, the Oceans Will Rise
No, this is not the typical high tide versus low tide you see when you go to the beach. Consider the oceans getting higher by 216 feet. To give you a sense of the size of that, the Mount Rushmore sculpture in the Black Hills of Keystone, South Dakota, with the four President’s faces sculpted into it is 465 feet high. So George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln would be about nose high in ocean water!