Ocean scientist David Holland calls Greenland “the end of the planet.” The New York University professor is mostly talking about Greenland’s location in the North Atlantic. But in many ways, it is where the planet’s future is being written. Holland spoke with The Associated Press during his recent visit to the world's largest island. The ice he was standing on is thousands of years old. It will be gone within two years, adding more water to already rising seas around the world. Summer this year is hitting Greenland hard, with record-setting heat and melting ice. By the end of the summer, more than 400 billion metric tons of ice will have melted or broken off from Greenland’s huge ice sheet, scientists estimate. That is enough water to cover the nation of Greece about 35 centimeters deep.