COP17 Closes in Ulaanbaatar Without a Global Drought Agreement, Deferred to 2028

The UN desertification summit that Mongolia spent two years preparing for has closed with progress on the host country's priorities and failure on the issue it was convened to settle.

COP17 ended in Ulaanbaatar on Friday 28 August after two weeks and roughly 15,000 participants, under the theme "Restoring Land. Restoring Hope."

The World Wide Fund for Nature said the conference delivered important progress on rangelands, grasslands and pastoralist communities but failed to secure a long-awaited agreement on drought resilience. Parties agreed instead to continue negotiations at COP18 in 2028.

That is the second deferral. Countries had already failed to agree a legally binding drought deal at COP16 in Riyadh in 2024, pushing the question to Ulaanbaatar. The African Group had pressed for a binding protocol; others favoured a non-binding framework.

WWF warned that continued delays come as communities and ecosystems in many parts of the world face increasingly severe drought impacts.

What was agreed

The conference was not without outcomes, and several of them reflect Mongolian priorities.

Governments adopted decisions on protecting, sustainably managing and restoring rangelands and grasslands, supporting pastoralists and local communities, and promoting a transition toward nature-positive agriculture.

Parties also adopted the final report of the Intergovernmental Working Group on the Future Strategic Framework, agreed to continue developing the Convention's strategic framework beyond 2030, and approved measures to improve the effectiveness of the Conference of the Parties and its subsidiary bodies. The plenary adopted a resolution thanking Mongolia for hosting.

Egypt was appointed host of COP18.

Why rangelands mattered to Mongolia

The host country's agenda was shaped by its own position, which is among the most severe of any party.

Nearly 77% of Mongolia's land — across a territory of 1.56 million square kilometres — is already degraded. It is among the ten countries most affected by climate change, and its pastoral economy depends directly on rangeland condition.

At Mongolia's initiative, the UN General Assembly declared 2026 the International Year of Rangelands and Pastoralists, and COP17 fell within it. Mongolia also promoted its president-led Billion Trees campaign, launched in 2021 with a target of one billion trees by 2030.

Getting rangelands, pastoralists and herder participation into the outcome documents of a UN convention is a durable result for a country of 3.5 million hosting its first summit of this scale.

The gap that remains

The numbers framing the conference explain why the drought failure matters.

Up to 40% of the world's land surface is degraded. Countries have pledged to restore roughly one billion hectares by 2030, against an estimated 1.5 billion to 2 billion hectares of degraded land — a gap of at least half a billion hectares between commitment and problem.

More than 70 countries now have national drought plans. What they do not have is a common framework governing how drought is anticipated, financed and responded to across borders.

What to watch

COP18 in Egypt in 2028 inherits the drought question for a third attempt.

The second is finance. The European Union argued at the opening plenary that redirecting existing finance can matter as much as increasing it — an argument that will shape whether the rangelands decisions produce anything.

The third is implementation in Mongolia itself. A host country with 77% land degradation now has international decisions aligned with its domestic programme, and the Billion Trees target falls due in 2030.