A landmark report by climate change scientists released Monday is expected to ratchet up the pressure on world leaders to rapidly end the use of polluting fossil fuels. Some of the most important readers of the 3 949-page report by the United Nations-backed Intergovernmental Panel on Climate Change—or at least the more manageable “summary for policymakers”—will soon be headed to Glasgow, Scotland, for COP26 climate talks, also organized by the UN. In less than three months’ time, UK Prime Minister Boris Johnson will host 197 countries for negotiations aimed at limiting global temperature rise, which is already causing wildfires and flooding around the world.