(CNN) We've known for some time now that Greenland's ice sheet is melting at an alarming rate . Greenland's ice sheet -- which contains enough water to raise global sea levels by 24 feet -- is melting as fast as at any time in the last 12,000 years, a new study finds. What happens to Greenland's ice sheet and others around the globe will determine what the future holds for the millions of people living along the world's coasts. In terms of its potential to raise sea levels, Greenland is the world's second most important ice sheet, behind only Antarctica. Greenland's ice sheet contains enough water to raise global sea levels by 24 feet .

Source: CNN September 30, 2020 18:22 UTC