Glaciers’ wane not all down to humans

Nature: The Great Aletsch Glacier is ill. Over the course of the twentieth century, the largest Alpine glacier, in Valais, Switzerland, receded by more than two kilometres, and Switzerland's 1,500 smaller glaciers are not faring any better. Is it all down to man-made global warming? Not according to a recent study, which finds that about half of the glacier loss in the Swiss Alps is due to natural climate variability1 -- a result likely to be true for glaciers around the world. "This ......

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