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Quick Facts Presently, 10% of land area is covered with glaciers. Glaciers store about 75% of the world's freshwater. Glacierized areas cover over 15,000,000 square kilometers. Antarctic ice is over 4,200 meters thick in some areas. In the United States, glaciers cover over 75,000 square kilometers, with most of the glaciers located in Alaska. During the last Ice Age, glaciers covered 32% of the total land area. If all land ice melted, sea level would rise approximately 70 meters worldwide. Glacier ice crystals can grow to be as large as baseballs. The land underneath parts of the West Antarctic Ice Sheet may be up to
2.5 kilometers below sea level, due to the weight of the ice.
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