Images of the Géant Glacier as a landmark UN assessment says global heating has arrived with a vengeance, and will see Earth's average temperature reach 1.5 degrees Celsius above preindustrial levels around 2030, a decade earlier than projected only three years ago. The Intergovernmental Panel on Climate Change (IPCC) bombshell -- landing 90 days before a key climate summit desperate to keep 1.5C in play -- says the threshold will be breached around 2050, no matter how aggressively humanity draws down carbon pollution. STOCKSHOTS of Géant Glacier on the Mont Blanc massif in the Alps