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Antarctica's and Greenland's ice sheets hold over 68% of Earth's fresh water. If Antarctica's ice melted completely, sea level would rise about 190 feet.

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Antarctica's and Greenland's ice sheets hold over 68% of Earth's fresh water. If Antarctica's ice melted completely, sea level would rise about 190 feet.ILLUSTRATION · AI

The Antarctic and Greenland ice sheets together hold over 68 percent of Earth's fresh water, the National Snow and Ice Data Center says.

They also contain more than 99 percent of the planet's land ice. Ice sheets are constantly in motion, spreading out under their own weight in broad domes.

The Antarctic Ice Sheet contains about 30 million cubic kilometers (7.2 million cubic miles) of ice. If it melted entirely, sea level would rise about 58 meters (190 feet).

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