Clinton Warns of Global Warming Dangers

in the South Pole in the last 10 years, 12 chunks of ice the size of Rhode Island have broken off," Clinton told the volunteers with City Year South Africa, a youth service organization he helped inspire.

"If this continues for another couple of decades, part of South Africa will be under water, and we will lose 50 feet of Manhattan Island in New York."

"Most of the headlines today are full of sad stories -- September 11, 2001, the horrible day in London a couple of days ago, when people die of suicide attacks in the Middle East," Clinton said. "In every case where there is a human-caused tragedy, it is because the people involved thought their differences were more important than their common humanity."