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The new report evokes a mild sense of urgency, calling on governments to mobilise finance to accelerate the uptake of green technology. But its conclusions are far removed from a direct interpretation of the IPCC’s own carbon budgets (the total amount of CO₂ scientists estimate can be put into the atmosphere for a given temperature rise).

Climate scientist Kevin Anderson is one of the world's leading authorities on carbon budgets. He told DW keeping global warming below 2 degrees is a choice — but it's one we have to make it fast.