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UN Report Says 1.5°C Threshold Will Likely Be Crossed

A new strategy focuses on limiting peak warming, shortening the time above 1.5°C, then bringing temperatures back down this century

Overview

  • The United Nations Environment Programme report, released Wednesday, concludes the world is on track to exceed the Paris 1.5°C limit within a few years if current policies continue.
  • UNEP frames an 'overshoot, peak and decline' pathway that accepts a temporary breach but prioritizes keeping the peak low and the overshoot short to reduce harm.
  • The report says immediate and sustained cuts in greenhouse gases are essential, alongside scaled adaptation finance, and that carbon dioxide removal will be needed but remains uncertain and cannot replace rapid emissions cuts.
  • Large obstacles to the optimistic pathway include record 2025 CO2 emissions, ongoing fossil‑fuel use, political rollbacks, and rising electricity demand from AI and data centres that is driving new gas‑fired power plans.
  • Passing 1.5°C raises the odds of stronger heatwaves, floods, food and water stress, and long‑term risks like ice‑sheet loss, which heightens calls for justice‑focused finance and stronger international negotiation at upcoming climate talks.