UNEP report says 1.5C target is no longer feasible without overshoot

· Climate

A new United Nations Environment Programme report concludes that limiting global warming to 1.5 degrees Celsius above pre-industrial levels is no longer a realistic outcome, even under the most ambitious emissions-reduction scenarios in the assessment. The report's lowest-warming pathway would require steep cuts in greenhouse gases yet still could not avoid a temporary breach of the threshold. Carbon Brief reports that UNEP says the opportunity to meet the 1.5C limit without an overshoot has been "lost" after decades of insufficient climate action, and descriptions of a temporary breach as "inevitable." The finding comes as governments prepare for the next round of international climate negotiations, and it shifts the policy debate toward managing overshoot and its risks rather than preventing any breach at all.

Why it matters：The 1.5C threshold has anchored national climate targets, corporate transition plans and investor risk models; its formal abandonment reframes the global policy debate around overshoot and adaptation.

Key points

  • The report says the lowest-warming scenario still requires steep emissions cuts but cannot prevent a temporary breach.
  • UNEP describes the missed opportunity as a result of decades of insufficient climate action.
  • The finding lands ahead of the next round of international climate negotiations.

Sources (original reporting)

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