The science of climate change is now well established. This is the result of painstaking work of over two decades carried out by thousands of scientists drawn from across the globe to assess every aspect of climate change for the benefit of humanity. The Fourth Assessment Report (AR4) of the Intergovernmental Panel on Climate Change (IPCC) was produced in the year 2007, and highlighted, on the basis of careful observations extending over a long period of time, that “warming of the climate (…)