@CNN: Greenland’s massive ice sheets contain enough water to raise global sea levels by 23 feet, and a new study shows that they are melting at a rate “unprecedented” over centuries — and likely thousands of years https://t.co/wsPro87gcL

Greenland's massive ice sheets contain enough water to raise global sea levels by 23 feet, and a new study shows that they are melting at a rate "unprecedented" over centuries — and likely thousands of years https://t.co/wsPro87gcL

— CNN (@CNN) December 7, 2018