Argentina's Upsala Glacier; formerly the largest glacier in South America, it now recedes at 450 feet per year.
A receeding glacier in the Andean Mountains. The loss of this glacier threatens the water supply and inherent life of 30 million Peruvians.
These photos are of Riggs Glacier in Muir Inlet at Alaska's Glacier Bay National Park. In 1941, the glacier was 2,000 feet thick, now vegetation grows where the glacier once stood.
The photos reveal so much more of the story.
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