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The Latest Breaking News from C40

40 mayors worldwide unite to fight back against the AI data centre surge

From Phoenix to Melbourne, a global coalition of city leaders says the AI data centre boom is draining their power, water and land — and they are done waiting.

Euronews

Forty mayors from cities across the globe sign onto data center development pact

About half of participating mayors are from the U.S.

The Independent UK

Revealed: All the freebies London mayor Sadiq Khan received in 2025

Two tickets to the British Museum’s Inaugural Pink Ball charity fundraiser are among the freebies enjoyed by London’s mayor

Evening Standard

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Cop30 enters crunch week as fights over money and fossil fuels intensify

The Cop30 climate summit enters its final week in Brazil with ministers heading into closed rooms to fight over climate money, fossil fuels and how to protect people already hit by rising heat, storms and floods. Civil society groups say trust is thin after a decade of broken promises.

Radio France Internationale

Revealed: 'Green king' Sadiq Khan has clocked up 100,000 air miles since becoming London mayor

Full extent of London mayor’s foreign travel catalogued for first time since he was elected to City Hall in 2016

Evening Standard

Mayors pledge coordinated climate action ahead of UN conference in Brazil

A coalition of mayors from around the world also launched a global coalition to prepare cities for a hotter future.

Euronews

Mayors pledge coordinated climate action ahead of UN conference in Brazil

Three hundred mayors have gathered in Rio de Janeiro to pledge coordinated climate action in their cities

The Independent UK

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Sadiq Khan clocks up nearly 28,000 air miles this year as 12,000-mile Brazil climate trip sparks row

London mayor’s appearance in Rio is his fifth foreign visit of 2025 - clocking up 27,572 aviation miles since January

Evening Standard

Sadiq Khan flies into row over 12,000-mile round trip to Brazil to warn of dangers of climate change

London mayor has made more than 20 foreign trips in nine years at City Hall

Evening Standard

OPINION - Sadiq Khan: Why I told the Pope's climate summit we must double down, not back down

It’s an honour to have been invited by the Pope to speak at an important climate summit at the Vatican. Following my recent re-election in London, I go with a clear message for other city leaders — this is not the time to back down, but to double down.

Evening Standard

Sadiq Khan to meet Pope Francis this week and hail benefits of Ulez

London Mayor is attending a climate change summit event at the Vatican on Thursday

Evening Standard

Humza Yousaf announces £2m loss and damage funding for vulnerable countries at COP28

HUMZA Yousaf has announced a further £2 million in funding for loss and damage caused by climate change in marginalised communities at COP28.

The National (Scotland)

Leaders of world’s major cities call for phase-out of fossil fuels

As Cop28 conference begins, letter to heads of state from the C40 group says fossil fuels era must end

The Guardian - UK

Sadiq Khan off to New York for US climate summit and Prince William meeting

The mayor is due to fly to the US on Sunday on a four-day trip to ‘bang the drum’ for the capital

Evening Standard

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Evening Standard

Several London boroughs ‘interested’ in zero emission zones

Deputy Mayor Shirley Rodrigues said there were no immediate plans for the zones, but that they formed part of the mayor’s longer term strategy for the capital

Belfast Live

Belfast City Council hoping to halve emissions by 2030 as it applies to join C40

Belfast has to sign up to climate "leadership standards" to join group of cities

Evening Standard

Sadiq Khan travels to Argentina to lead world city action on climate change

Sadiq Khan said he was hoping to learn new ideas on tackling climate change as he began a three-day visit to Argentina on Wednesday.

The Conversation

Air pollution in fast-growing African cities presents a risk of premature death

Ten more African cities have signed on to the C40 Clean Air Cities Declaration to improve air quality. C40 is an international group of mayors collaborating to make cities more environmentally sustainable.

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