A new study points to a key window of opportunity to save Greenland's ice sheet

https://www.npr.org/2023/10/18/ [login to see] /a-new-study-points-to-a-key-window-of-opportunity-to-save-greenlands-ice-sheet
The vast ice sheet that covers most of Greenland has waxed and waned over hundreds of thousands of years. Today, it is up to 2 miles thick and so packed with ice global sea levels would rise 20 feet if it all melted. But scientists now know that at times deep in the past, the ice sheet shrank back so far that it was almost nonexistent.

For years, scientists have worried and warned that such a full- or near-full collapse of the Greenland ice sheet could once again happen if global temperatures rose too high. That would push sea levels up worldwide, further impacting coastal communities. Exactly how warm it would have to get to cross that threshold has been fuzzy.