UN Report: 1.5°C Warming Limit Now 'Largely Out of Reach,' Urgent Action Needed

The global goal of limiting warming to 1.5 degrees Celsius above pre-industrial levels is now largely unattainable, according to the United Nations Environmental Programme's (UNEP) 2026 Emissions Gap report. The comprehensive assessment of global climate action, released Wednesday, states that while the window to prevent exceeding the 1.5°C threshold has closed, limiting peak warming and returning temperatures to below this level by the end of the century remains possible through immediate and ambitious action.

"We've spent decades postponing cuts to emissions and now we're facing the consequences," said Anne Olhoff, director of the UNEP-Copenhagen Climate Centre and a report author. "The world can still attain the goals of the Paris Agreement, but we must work hard to not only meet but surpass our most ambitious climate targets. The longer we wait, the larger the risk that we jeopardize the temperature goal."

Projected Warming Scenarios

The report highlights that under current policies and the existing Nationally Determined Contributions (NDCs) submitted by over 150 nations, the planet is on track for 2.8°C of warming by 2100. Even if countries meet their upgraded NDCs, set for 2035, global warming is still projected to reach 2.6°C by the end of the century. Both scenarios carry severe consequences, including dramatic changes to sea levels and ecosystems, and an increased likelihood of compounding climate extremes such as heatwaves, droughts, and wildfires.

Necessary Emissions Reductions

To potentially limit warming to 1.7°C or 1.8°C, the report outlines the need for substantial emissions cuts. This would require an 18% reduction in emissions by 2030, 45% by 2035, and 69% by 2040, relative to 2025 levels. These reductions must be sustained and coupled with carbon dioxide removal efforts. "Every additional fraction of a degree and additional year of warming above 1.5°C increases climate impacts and risks, such as the deadly floods, heat waves, and wildfires that have plagued many nations this year," stated UNEP Executive Director Inger Andersen.

United States Emissions Outlier

The report identifies the United States as a significant outlier in terms of emissions. While emissions growth has slowed in most G20 countries, U.S. emissions have notably increased, partly due to rising electricity demand, including from data centers, and policies that have favored fossil fuels over clean energy. The U.S. is the second-largest emitter of greenhouse gases globally, behind China.

The U.S. State Department issued a statement indicating that the nation "does not endorse or agree with its analysis or conclusions, and has not provided comments to this report." The report also notes that the Trump administration's withdrawal from the Paris Agreement impacted climate projections by excluding anticipated U.S. climate actions.

Progress in Climate Policies

Despite the stark warnings, the report also points to progress. Since the Paris Agreement's adoption, global renewable electricity capacity has grown three times faster than anticipated, and solar PV build-out has increased sevenfold. If these trends continue, alongside supportive policies, the world could meet its renewable energy goals. The report examined over 200 climate policies, finding that they target emission reductions across various sectors and countries, signaling that solutions exist and can be scaled. "We have a wealth of success stories showing that emissions can be cut quickly," Andersen said. "It is now up to nations to urgently put in place policies that spark fast, deep and sustained emissions reductions, and put the world on track for a more stable climate and more stable economies and societies."