Three-quarters of Greenland is covered by what?

Greenland is the world's largest island, located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is an autonomous territory within the Danish Realm. The majority of its residents are Inuit, whose ancestors migrated from Alaska through Northern Canada, gradually settling across the island by the 13th century.

Three-quarters of Greenland is covered by the only permanent ice sheet outside of Antarctica. The weight of the ice sheet has depressed the central land area to form a basin lying more than 300 m (984 ft) below sea level, while elevations rise suddenly and steeply near the coast.

The lowest temperature ever recorded in the Northern Hemisphere was recorded in Greenland, near the topographic summit of the Greenland Ice Sheet, on 22 December 1991, when the temperature reached −69.6 °C (−93.3 °F).