Tackling climate change effectively requires a global collaborative effort. This must be based on a common understanding of the magnitude of the challenge and of what is required to reduce the risks. It is therefore critical that the issue is widely discussed. I hope that my review on the economics of climate change will provide a building block for this important debate.

Now, one week after publication, I am keen to respond to some of the questions that have already arisen and to explain some further thinking about what I believe to be an innovative new approach to looking at this problem.