UNEP reports world has missed chance to limit warming to 1.5°C

UNEP warned on Tuesday that the world has missed the chance to keep global warming below 1.5°C without any overshoot, saying a temporary breach of the limit is now inevitable after decades of insufficient climate action. The statement, released ahead of the upcoming UN climate summit, cites the latest emissions data and the Intergovernmental Panel on Climate Change’s (IPCC) 2023 assessment, which shows that current policies would push average temperatures past 1.5°C by 2030 before any brief dip back below that threshold.

The loss of the “no‑overshoot” window matters because staying under 1.5°C without exceeding it reduces the risk of catastrophic impacts such as extreme heatwaves, sea‑level rise, and loss of biodiversity. Scientists have warned that even a short overshoot could trigger irreversible changes, like the melting of Greenland’s ice sheet, that would lock in higher temperatures for centuries. The warning follows a series of missed targets: the 2015 Paris Agreement pledges, the 2021 Glasgow Climate Pact, and the 2023 IPCC report that called for cutting global CO2 emissions by 43% by 2030. Yet global emissions have continued to rise, reaching a record 37 billion tonnes of CO₂ in 2023, driven largely by coal use in Asia and continued fossil‑fuel subsidies in several economies.

Climate groups and some governments reacted with alarm. The World Wildlife Fund called the UNEP assessment a “wake‑up call” and urged immediate scaling of renewable energy and carbon‑removal projects. The European Union pledged to double its climate finance for developing nations, while the United States signaled support for a new global carbon‑pricing framework. Critics, however, argue that the language of “inevitable overshoot” could be used to justify delayed action, urging policymakers to focus on concrete measures rather than rhetoric.

UNEP says the next steps must include rapid decarbonisation, massive investment in clean technologies, and the deployment of nature‑based solutions such as reforestation. It also stresses that any overshoot should be brief and that the world must prepare for the long‑term impacts of a hotter climate. The agency will present a detailed roadmap at the UN climate summit in November, hoping to galvanise stronger commitments before the window for a no‑overshoot pathway closes completely.