André Corrêa do Lago, the experienced Brazilian diplomat and climate negotiator appointed this week, told the Financial Times that the exit of the US could also allow nations such as China, India and Brazil to take a bigger role in the world’s most important climate talks.

Brazil's newly nominated head of the planned 2025 COP30 climate summit in the Amazonian city of Belem warned on Tuesday that President Donald Trump's decision to withdraw the United States from the Paris Agreement would cast a shadow over the talks.

The US reversal on climate change will have “a big influence” on discussions at the global summit, said COP30 President Andre Correa do Lago.

Brazil warned Tuesday that US President Donald Trump's decision to withdraw from the Paris climate agreement would have a major impact on COP30 talks to be held in the Amazon in November.

Brazil is expected to announce on Tuesday that ambassador Andre Correa do Lago will be president of the 2025 COP30 global climate summit in the Amazonian city of Belem, three people with knowledge of President Luiz Inacio Lula da Silva's plans told Reuters.