"As permanent ice decreases, we are looking at ice-free summers in the Arctic as early as 2030." http://www.greenpeace.org/international/en/news/features/urgent-action-needed-as-arctic/
This was jumped on by climate change skeptics, especially after a debate started within the scientific community about whether pressure groups such as Greenpeace should 'emotionalize' the science in order to win the public over. Skeptics argued that an ice-free Arctic would be impossible as ice on land, such as the Greenland ice-sheet, has been around for 'hundreds of thousands of years' (the quotation marks are important in order to constrain