C40 Cities
@c40cities.bsky.social
A global network of city mayors delivering urgent climate solutions. Protecting the people and places we love. 🌳🌍🌆💚 http://www.c40.org/
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. 🏆
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.
"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
As we have experienced this week, extreme temperatures are no longer a future threat. They are a present danger. Today, I’m launching London’s first ever heat plan: a city-wide plan to adapt our capital, protect communities, and build a climate-resilient city.
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.
Estimated annual deaths associated with air pollution in London reduced by around 40% between 2019 and 2024. Real change is possible.
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.
As climate impacts intensify, mayors shared how they are protecting communities from extreme heat, water scarcity and other growing climate risks.
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.
At the Local Climate Action Summit, mayors joined business leaders to explore how cities are moving away from fossil fuels while improving life for residents. The mayors of Copenhagen, Athens, and Melbourne shared how their cities are advancing the transition.
Medellín commits to the Yearly Offer of Action 🇨🇴 Over the next 12 months, the city will restore its rivers through climate-resilient urban planning and help protect people from flooding and climate risks.
Today, C40’s Managing Director of Climate Solutions and Networks, Cassie Sutherland, announced the launch of a new guide for how cities around the world can develop local roadmaps to take action on transitioning away from fossil fuels. www.c40knowledgehub.org/s/article/Ho...
Today, UN Secretary-General António Guterres joined C40 Co-Chairs @sadiqkhanlondon.bsky.social @london.gov.uk & Mayor Aki-Sawyerr to discuss maintaining climate action in an increasingly uncertain world.
"London isn’t just calling. It’s cooking." A powerful speech from the UN Secretary-General António Guterres at #LCAW26 on the imperative to solve the climate and energy crises - both driven by fossil fuels. Cities are already accelerating global climate progress - and we need everyone on board.
Our Yearly Offer of Action was built around a simple principle: climate progress is measured by what we deliver. At #LCAW26, UNFCCC Executive Secretary Simon Stiell highlighted its importance, as more mayors join the initiative.
Fantastic news to see how the Breathe Cities initiative continues to grow. Today’s investment is proof that local leadership, backed by the right global support, can drive change at a scale that matters. @bloombergdotorg.bsky.social @cleanairfund.bsky.social www.forbes.com/sites/jamieh...
Global Breathe Cities Network Set To Expand Following $45m Investment
The global Breathe Cities initiative to improve air quality and protect public health is set to expand, following a $45 million investment from Bloomberg Philanthropies.
forbes.com
