Overview
- The UN Environment Programme released its report on Wednesday, Sept. 2, 2026, concluding the Paris goal of staying below 1.5°C is now likely to be breached within the next few years and shifting policy from avoidance to managing an overshoot.
- UNEP quantifies possible futures: full implementation of current pledges could still see a peak near 1.8°C while policies now in place point to a median warming of about 2.6°C by 2100.
- To make a return below 1.5°C feasible the report says the world needs immediate, sustained emissions cuts plus rapid reductions in methane and very large-scale carbon dioxide removal that is carefully governed and adds to, not replaces, cuts.
- The report warns that any overshoot will raise the chance of extreme heat, faster ice loss, rising seas, ecosystem collapse and irreversible tipping points that will hit small island states and poor communities hardest.
- UNEP’s findings have intensified calls from vulnerable nations and campaigners for faster fossil-fuel phaseouts, more finance for adaptation, and robust rules for carbon removal ahead of regional talks and COP31.