Our grandchildren are going to face around *double* the sea level rise the IPCC predicted. All earlier predictions were for Greenland’s steady melting. Now that Antarctica’s on the move, that should double. Note: this precludes ‘sudden dynamic ice events’. The IPCC could agree when the Greenland ice-sheet might suddenly ‘slip’ into the ocean, and so didn’t account for it. If that happens, the predicted sea-level could be so much worse than the IPCC predicted!