What's happening to the Arctic?
2007 saw a surprise record low in summer sea ice in the arctic, much sooner than anyone was expecting.
Once ice disappears from the sea surface, the sea can absorb much more heat from the sun, creating a feedback loop which would lead to more global warming. Scientists are concerned that we do something about climate change before natural processes like these start to radically alter the global climate. See our climate change pages for more details.