Next UN Chief May Downgrade Climate Action, Experts Fear 2026

Fears are mounting that the next UN secretary general will downgrade climate action, according to climate and civil society experts. As António Guterres prepares to step down at the end of his second term on 31 December, the selection of his successor has become a focal point of global concern, with many worried that the UN's strong stance on the climate crisis could weaken.

Guterres's Legacy of Climate Advocacy

António Guterres has been the most forthright UN chief on the climate crisis, calling fossil fuel companies “the godfathers of climate chaos” and warning governments they are rushing down a “highway to hell” by failing to cut greenhouse gas emissions. His repeated championing of the urgency of the crisis and willingness to take on vested interests are credited with significant global impacts, forcing governments to confront their policy failures and keeping alive the aims of the 2015 Paris climate agreement, despite the rising tide of populism and disinformation.

Candidates and Concerns

Many of Guterres's most likely successors have shown less enthusiasm for tackling the climate crisis, despite rising alarm at its impacts. Experts have told the Guardian that some candidates could be “disastrous” yet could enjoy the support of influential countries including the US and its allies. Three candidates in particular have raised concerns: the Argentinian diplomat Rafael Grossi, who heads the International Atomic Energy Agency; and others who have been less vocal on climate issues.

Potential Impacts on Global Climate Policy

A downgrade in climate action at the UN level could have far-reaching consequences. The secretary general plays a crucial role in setting the global agenda, mobilizing action, and holding governments accountable. A less committed leader could slow progress on emissions reductions, weaken the Paris Agreement, and embolden countries to backslide on their climate commitments.

Key Takeaways

• Guterres's departure marks the end of an era of strong UN climate leadership.
• Several candidates have shown less commitment to climate action.
• The next UN chief could face pressure from powerful countries to deprioritize climate.
• Experts warn that a downgrade could have disastrous consequences for global climate efforts.

The Road Ahead

The selection process is underway, with heads of government meeting in New York this week for the UN General Assembly. The choice of the next secretary general will be one of the top concerns. Climate and civil society experts are urging governments to select a candidate who will maintain the urgency and ambition needed to tackle the climate crisis.

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