Moving from a high-carbon to a low-carbon economy entails replacing the global energy and industrial high-carbon infrastructure over the next decades. UN’s recent Economic and Social Survey 2011 – The Great Green Technological Transformation estimates replacement costs at $15-$20 trillion, or between one quarter and one third of global income.

This is a herculean task. One that has been interpreted more as an insuperable obstacle than as a great opportunity. The cost and magnitude of the shift seems, at first glance, to be a formidable barrier. It takes diverting a large chunk of global savings and investment towards this task. If we do it as fast as science has been asking us to to, we’ll leave unexploited a wealth