fuzzy maths

The thawing of permafrost in one region of the Arctic will cause damage worth $65 trillion, or 80 per cent of the entire global economy last year, new research suggests.

According to a UN report released last year, Policy Implications of Warming Permafrost, large-scale and irreversible thawing is already under way.

Under business-as-usual scenarios, in which nations continue to emit greenhouse gases at present rates, the total damage bill would be the equivalent of about $65 trillion, the paper said. This is about 80 per cent of the entire 2012 global economy.

If the world switched to a low-emissions path, the cost would be delayed somewhat and would end up being about $40 trillion.

Sydney Morning Herald, 25 Jul 2013