Such a rise would probably lead to fast-melting ice sheets, rising sea levels, drought, disease and collapsing agriculture in poor countries, and mass migration.
China has been making strenuous actions to buy mines of RE ore around the world, to maintain its dominance of the global markets, and I wonder whether this will extend to Greenland, where the melting ice-sheet is likely to ease access to the rich veins of REs and other elements that the world needs to maintain its technologies and energy supplies.