C40 Cities
@c40cities
A global network of city mayors delivering urgent climate solutions. Protecting the people and places we love. 🌳🌍🌆💚
How can we beat disinformation? In this Cities 1.5, Mayor Senkevich of Mykolaiv joins host David Miller to explore why communication is key and how the new City Climate Facts initiative is helping cities tackle fake news with facts: lnk.to/HotTakes5
Cities worldwide are committing to shape a digital future that doesn’t come at the expense of the people and places we love.
Since the adoption of generative AI in 2022 and 2023, global spending on data centres has surged. As energy demands increase, so does the need for greater oversight. City leaders have an opportunity to bridge this policy gap, protecting both local resources and communities.
Climate resilience starts long before a disaster strikes. Cooler streets, flood-ready neighbourhoods, reliable public transport, prepared communities – these are the building blocks that set the foundation for a climate-resilient city.
Data saves lives. Around the world, cities are combining community insights, technology and urban design to protect the people and places we love. 👉
AI is booming – but who's making sure cities and people don't bear the cost? 41 mayors have a plan. In this Cities 1.5 episode, hear from 2 mayors co-leading the new Global Urban Data Centres Pact, and learn why they believe cities must shape the future of data centres: https://lnk.to/HotTakes4
Climate projects can solve more than just one problem. Melbourne’s work to transform the mighty Birrarung (aka the Yarra River) is improving resilience, restoring nature, and creating better public spaces all at once. C40's Vice Chair and Lord Mayor of Melbourne Nick Reece describes its impact.
Describe your city’s climate action plan in 30 seconds? Easier said than done. With so much underway, C40 Co-Chair and Mayor of Freetown Yvonne Aki-Sawyerr OBE picked just one climate action to highlight, and talks us through it in under 30 seconds. 🏆
The new Global Urban Data Centres Pact sets out a shared vision to ensure data centre growth is sustainable, affordable and puts communities first. Endorsing mayors are calling on the industry to join cities in turning this ambition into action.
Mayors are coming together to take action on one of the fastest-growing challenges facing our cities.
“For how many years have we seen C40 Cities really take the lead on very difficult issues when national governments have not been able to do so.” - Christiana Figueres @outrageoptimism.bsky.social reflects on #LCAW and how extreme heat shaped the week's discussions. 🎧 https://c40.me/4eRPAhw
Ridiculous climate conspiracies? These mayors have heard them all, and the facts tell a different story. That's why C40 Cities has launched City Climate Facts to help cities tackle climate disinformation: https://c40.me/4xXA3oO
cities 🤝 businesses Energy security, affordability and resilience continue to dominate local agendas. At #LCAW26 city and business leaders, including mayors of Melbourne, Phoenix, Renca and Cluj-Napoca, discussed how working together can unlock solutions and reduce emissions.
We need urban planning to make cities climate-safe. At #LCAW26 city leaders, experts, Community Jameel & @genslerdesign.bsky.social discussed how planning, data & nature can strengthen resilience. The C40 & @un-habitat.bsky.social Accelerator stood out as a model for turning ambition into delivery.
Former Mayor of Toronto David Miller, C40 Executive Director @mark--watts.bsky.social, and @philipprode.bsky.social (LSE) explored what it means to lead with courage during the climate crisis and how cities can continue to drive progress despite growing global uncertainty.
The inaugural Nicky Gavron Memorial Lecture opened an annual series that will celebrate female urban leaders. The keynote, delivered by @annehidalgo.bsky.social, former Mayor of Paris, reflected on driving transformative climate action in an era of political polarisation and disinformation.
"Nicky understood that climate action must be rooted in solutions that work for people." Yesterday we honoured the legacy of Nicky Gavron, former Deputy Mayor of London and pioneering environmental campaigner. #LCAW26
Mayor of Phoenix @mayorgallego.bsky.social, Mayor of Medellín Federico Gutiérrez, and Deputy Mayor of Barcelona Laia Bonet discussed how public-private collaboration can help deliver greener, more resilient neighbourhoods while addressing housing needs.
Housing and climate action are often presented as competing priorities. Today, C40 Cities was joined by Holcim Foundation for Sustainable Construction, Urban Partners, and Arup to highlight how cities can expand housing supply while advancing climate goals.
Chaired by the former Mayor of Paris @annehidalgo.bsky.social, the council focused on how national governments can better support cities and regions in delivering climate action.
The meeting marked an important step in establishing CHAMP’s new Subnational Advisory Council, which will provide a formal platform for local and regional leaders to advise the 77 national governments and the European Union participating in the coalition.
National climate goals can only be achieved when cities, states, and regions are fully empowered to act. Leaders gathered at #LCAW today to help shape the future direction of the Coalition for High Ambition Multilevel Partnerships (CHAMP).
From Melbourne to Phoenix, mayors are joining forces to help shape the future of data centre growth. The new Global Urban Data Centres Pact unites 41 cities behind a shared vision for sustainable data centre development that puts people first. Learn more: c40.me/urbandatacentres
Day 2 of London Climate Action Week was all about the systems and solutions needed to power a growing urban world while keeping climate goals within reach. Watch for a quick look back at the day. 📽️ #LCAW2026
At #LCAW26, the Mayor of Milan joined Novo Nordisk and the Z Zurich Foundation to explore how walkable neighbourhoods, public spaces and urban design can improve resilience and health. With C40’s Green and Thriving Neighbourhoods programme, cities are improving the quality of life for residents.
At the Local Climate Action Summit, the Mayor of Medellín joined Mars, Community Jameel and Ramboll to discuss how nature-based solutions and partnerships can create greener, healthier neighbourhoods.
In a session on electric futures, the Mayors of Curitiba and Phoenix joined Uber and The Climate Pledge to discuss how cities and businesses can accelerate transport electrification, lower emissions, and deliver clean air.
