Condemnation by climate scientists of the Garnaut report is well placed.

Garnaut is an economist, and as such is concerned with the stability of the economic system. He recognises climate change, and tries to put in place a feasible plan for reduction of human activity related to warming.

The scientists however deal in objective reality: we need to radically reduce emissions now, or we're going to die. You can talk about whether other countries should be reducing their output and what is achievable, but all the while we're literally destroying the ecosphere. Preventing this destruction is something in the order of an absolute: we just need to do it, and other costs pale in comparison.