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The Guardian - UK
The Guardian - UK
World
Daniel Boffey in Rio de Janeiro

‘Politicians actually taking action’: six world mayors defying climate-sceptic populist leaders

Sadiq Khan and Eduardo Paes stand with their arms around each other's shoulders gesturing in a friendly way to each other.
London Mayor Sadiq Khan, right, with Rio de Janeiro Mayor Eduardo Paes in Rio on 5 November 2025. Photograph: Daniel Ramalho/AFP/Getty Images

Wooden stakes bearing pictures of young men were driven into the yellow sands of Copacabana beach this week, opposite Rio de Janeiro’s swanky hotels on Avenida Atlântica where 300 mayors and their entourages were staying during the C40 World Mayors Summit.

Smiling up at the mayors in their hotel suites were photographs of four officers killed in what was the deadliest police raid in Brazilian history, just a few days before the summit. A further 117 people were killed in the operation in two of Rio’s largest clusters of favelas – the Complexo do Alemão and the Complexo da Penha – in what the police said was a clampdown on organised crime.

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