A mountaintop look at Yosemite’s shrunken Lyell Glacier

Pete Devine of the Yosemite Conservancy explains how the Lyell Glacier has retreated in Yosemite National Park. Global warming is being blamed for the gradual disappearance of Yosemite's glaciers.
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Pete Devine of the Yosemite Conservancy explains how the Lyell Glacier has retreated in Yosemite National Park. Global warming is being blamed for the gradual disappearance of Yosemite's glaciers.