Climate change: Greenland's ice sheet has melted past the point of no return FRANCE 24 English'Canary in the coal mine': Greenland ice has shrunk beyond return, study finds ReutersGreenland's ice sheet has melted to a point of no return, according to new study CNNClimate change: Greenland's ice sheet has melted past the point of no return FRANCE 24 EnglishGoing, Going ...