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Glaciers are melting more quickly, losing 31 per cent more snow and ice per year than they did 15 years ago, according to three-dimensional satellite measurements of all the world's mountain glaciers.

Using 20 years of recently declassified satellite data, scientists calculated that the world's 220,000 mountain glaciers have been losing more than 298 billion metric tonnes of ice and snow per year since 2015, according to a study in Wednesday's journal Nature.

The annual melt rate from 2015 to 2019 is 71 billion metric tonnes more per year than it was from 2000 to 2004.

Global thinning rates, different than volume of water lost, doubled in the last 20 years.

Half the world's glacial loss is coming from the United States and Canada.

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