In September 2007, the European Space Agency (ESA) released an image of the polar ice cap. The ice covers the smallest area since it was first measured in 1978. The ice-covered area has dropped to about 3 million square kilometers (1.16 million square miles), a million less than a previous low in 2006 - a dramatic change. Take a look at the 2005, 2006, and 2007 images in sequence. Troubling, right? Well, here's what they had to say last month:
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