At the end of 2018 the IPCC published their full report on the difference between 1.5 °C verses 2 °C warming. The report was a comprehensive 700 page exploration. The United Nations met in Inchon in South Korea to negotiate the Summary Report for Policy Makers. This special report is the much shorter with less information on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways. The report was defined by the political voices in the room, but was crafted to help states choose actions in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty.
The full report , the summary report and more are both available on the IPCC’s website.