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Luiz Inácio Lula da Silva, center, poses for a family photo with leaders ahead of the COP30 conference in Belém on Nov. 7. — Luiz Inácio Lula da Silva, center, poses for a family photo with leaders ahead of the COP30 conference in Belém on Nov. 7.Photographer: Dado Galdeiri/Bloomberg

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By John Ainger and Jennifer A Dlouhy

November 9, 2025 at 4:57 PM UTC

Updated on

November 10, 2025 at 1:55 PM UTC

World leaders have departed the sprawling COP30 venue in the Amazonian city of Belém, Brazil, after hammering home the message that efforts to tackle climate change are moving too slowly.

Now the real work starts.