Following the 2015 Paris Agreement to hold the global increase in climate to below 2℃ above pre-industrial levels, the UN’s Intergovernmental Panel on Climate Change (IPCC) was asked to produce a report on the impacts of global warming of 1.5℃. The report focuses on what must be done if we want to avoid warming above 1.5℃, and the difference between 1.5℃ and 2℃ warming. The general message is that the ecological and social impacts of 1.5℃ are significantly more manageable than 2℃ – half a degree of warming is a big deal.