The most critical challenge for global economic governance is to find effective and fair ways of mitigating and adapting to climate change whilst at the same time reducing global income inequalities and realizing the development aspirations and unrealized human potential of millions of people in developing countries. Recent evidence, for example on sea level rise and the shrinking summer ice in the Arctic Ocean, suggests that climate change is occurring even faster than models pronounced by the Intergovernmental Panel on Climate Change (IPCC) have predicted. Biophysical feedback mechanisms, too often omitted from climate models, are likely to be a key factor in the underestimation and are likely to make climate change irreversible once critical atmospheric temperatures are passed. How fast we act will affect both the magnitude and reversibility of climate change. Some say 2015 will be too late; but even if they are wrong, the climate issue will certainly be at the top of the public agenda by then.

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