Former Vice-President Al Gore says that in 5 to 7 years the Arctic will have no ice in the summer.
http://www.cbsnews.com/news/gore-arctic-ice-may-soon-vanish-in-summer/
Gore said polar scientists told him Sunday that the latest data "suggest a 75 percent chance the entire polar ice cap will melt in summer within the next five to seven years."
http://www.cbsnews.com/news/gore-arctic-ice-may-soon-vanish-in-summer/