A standout moment at the #WMS25: youth activists declaring, "We do this for our today, we do this for our tomorrow, and we will do this together.”
This new Hot Takes episode from the Cities 1.5 podcast brings the young voices we heard to even more people - an absolute must-listen: lnk.to/HotTakes2
Graphic showing the sponsor logos for the 2025 World Mayors Summit. Gold: Novo Nordisk Bronze: Uber, Carrier and GIZ Exhibition: IBM
Over 2000 attendees, 300 mayors, 50 sessions and 1 shared purpose: to protect the people and places we love.
Thank you to the partners who made the C40 World Mayors Summit a success.
Gold: Novo Nordisk
Bronze: Uber, Carrier, @giz.de
Exhibition: IBM
#WMS25
Climate action can't wait. At #COP30 in Belém, cities are showing how they're leading the way to protect the people and places we love.
C40 Co-Chairs Mayor of Freetown Yvonne Aki-Sawyerr and Mayor of London Sadiq Khan have joined global mayors in announcing their yearly offers of action at #WMS25.
While the US federal government is trying to block global climate action, cities are stepping in to lead.
At #WMS25, mayors came together to stop climate breakdown. Hear what it was like on the ground in the Cities 1.5 World Mayors Summit Special dropping on 18 Nov. https://lnk.to/S6Trailer
During #WMS25 @outrageoptimism.bsky.social spoke with mayors about how they are turning ambition into action.
Listen to interviews with the mayors of Paris, Freetown, and Portland about how cities are cutting emissions, investing in resilience, and driving progress.
Copenhagen is building a cleaner future.
Lord Mayor Lars Weiss has committed that from 2026, all new municipal projects will meet low-emission standards, cutting construction carbon by about 20%.
#WMS25
Climate action means restoring nature in our cities.
In Wuhan, the city has committed to restoring Xibeihu Lake and transforming unused spaces into green gardens using sustainable practices like composting, enhancing the urban ecosystem for all.
#WMS25
Building a more inclusive, climate-resilient Tshwane.
Over the next year, Executive Mayor Dr. Nasiphi Moya has pledged to revitalise vulnerable areas through tree planting, clean-up drives and urban greening to build a safer, cooler Tshwane.
#WMS25
Santiago is planting seeds of climate resilience.
Governor of the Metropolitan Region of Santiago de Chile, Claudio Benjamin Orrego, has committed to transforming urban spaces with 33 new pocket forests, bringing natural cooling and cleaner air to neighbourhoods that need it most.
#WMS25
💬 "At #COP30, cities will stand as proof that the green agenda is both possible and profitable."
- Teresa Ribera, European Commission EVP & GCoM Co-Chair.
At #WMS25 in Rio, leaders from 🇧🇷🇨🇱🇦🇷 showcased how ambition becomes action.
@teresaribera.ec.europa.eu
Amman is accelerating green transport and smart waste management.
His Excellency, Dr. Yousef Al-Shawarbeh, Mayor of Amman has pledged to add new zero-emission buses and expand city-wide waste separation systems to create a greener, more circular economy.
#WMS25
Nanjing is building a future that’s both green and resilient.
The city has pledged that every new building that's part of its Sponge City project will meet green standards to make the city more resilient to climate risks.
#WMS25
Barcelona is investing directly in community climate resilience.
Mayor http://jaumecollboni.bsky.social/ has pledged to use tourist tax to protect some of the city's most vulnerable residents from extreme heat, for example by installing solar panels and cooling systems in schools.
#WMS25
The future of urban transport is electric and accessible to all.
Mayor Carola Schouten has pledged to drastically expand Rotterdam's charging network with new charging points and specialised hubs for port freight, powering a cleaner city.
#WMS25
Building the sustainable cities of tomorrow starts today.
Mayor of Athens Haris Doukas has pledged to launch a network of air quality stations, deploy sanitation vehicles and upgrade 300 schools for energy efficiency.
#WMS25
Quito pledges bold climate action.
Mayor Pabel Muñoz has pledged to plant 100,000 native trees, build new water treatment facilities and introduce electric buses to make Quito a greener city.
#WMS25
Dalian is building a safer, cleaner future.
The city has pledged to replace over 1,000 buses with electric models and launch a new climate protection plan to fight pollution and improve livability.
#WMS25
Shenzhen is scaling up action on air quality.
The city has committed to expanding the city's new energy vehicle fleet from 1.44 million to over 1.7 million by 2026. This will reduce pollution and improve air quality for all residents.
#WMS25
A wide shot from the audience shows a man speaking at a podium. A large screen behind him reads "LOCAL CLIMATE ACTION SUMMIT," "COP30 BRASIL AMAZÔNIA," and "Improving Lives through Climate Action."
A large screen on a stage displays a video of Michael R. Bloomberg. On-screen text identifies him and his titles. Below the screen, the silhouettes of people on stage and the audience are visible.
Six people stand in a line on a stage, smiling and clapping. Behind them is a large, colorful art panel and a white backdrop with event logos.
“Cities and regions will keep leading the way forward.” - @michaelrbloomberg.bsky.social
Over 3 days of #WMS25, 300+ mayors reaffirmed their unwavering commitment to fighting the climate crisis & made it clear that real on-the-ground solutions are essential to protect the people and places we love.
Six people stand on a stage in a line, facing the audience. Behind them, a large screen displays the words "All of you were once in our shoes" above childhood photos of Sir Sadiq Khan, Yvonne Aki-Sawyerr, and Eduardo Paes.
“We do this for our today, we do this for our tomorrow, and we will do this together.”
Youth activists from London, Freetown, and Vanuatu shared this message at #WMS25, spotlighting their work with cities and mayors to deliver powerful climate action on the ground.
Buenos Aires is charging ahead with clean transport.
Chief of Government Jorge Macri has committed to introducing a zero-emission electric corridor, cutting travel time by 40% for 50,000 daily commuters.
#WMS25
Thank you IBM for sponsoring the C40 World Mayors Summit exhibition and helping shape the future of sustainable cities.
#WMS25
A large group of people poses for a photo outdoors on a wooden deck, standing in front of trees and a large, colorful art installation.
A woman with glasses, identified as Teresa Ribera by a lower-third graphic, speaks at a lectern. The stage backdrop includes logos for the "Local Climate Action Summit," "COP30 BRASIL AMAZÔNIA," and "Bloomberg Philanthropies."
We were lucky to host many European mayors at #WMS25, part of the Local Leaders Forum, as well as @teresaribera.ec.europa.eu, who made the CHAMP announcement at the Local Climate Action Summit here in Rio today.
Cape Town pledges to scale up its clean energy.
Mayor Geordin Hill-Lewis has committed to commissioning the city's first-owned solar plant and adding battery energy storage, securing clean, affordable energy for thousands of homes.
#WMS25
Melbourne is accelerating its climate action.
As part of C40 and GCOM's yearly offer of action, Lord Mayor Nicholas Reece has committed to investing AUD $44.3 million to create new green spaces and plant thousands of trees, cooling the city and improving liveability.
#WMS25
Mayors are taking bold action.
Governing Mayor of Oslo Eirik Lae Solberg has committed to pioneering clean construction city-wide, cutting emissions from machinery and building materials.
#WMS25
As discussions at @imohq.bsky.social on the net zero framework are delayed until next year, cities and trade unions need to form powerful alliances to make sure maritime decarbonisation works for the planet and workers.
Carlos Muller, CONTTMAF President, at @c40cities.bsky.social #WMS25 👏
At the @c40cities.bsky.social #WMS25 'Clean shipping: multilateralism for zero emissions' session, Carlos Müller, CONTTMAF President, called for Port Welfare Committees for Seafarers - spaces that bring together local authorities, unions, and port operators to promote wellbeing for seafarers.
Milan is stepping up on its climate plans.
Mayor Giuseppe Sala has committed to reinforcing the EU’s largest Low Emission Zone and launching new community solar projects to build a cleaner, healthier city.
#WMS25
Two men in suits are seated in chairs on a stage. The man on the right speaks into a microphone, while the man on the left, wearing a headset, listens.
Five people stand in a line on a stage facing an audience. The man on the far left speaks from a podium, while the other two men and two women stand beside him.
As part of the CHAMP initiative, 77 countries are now working with their cities and regions to strengthen national climate plans.
Alongside Brazil’s Minister of Cities, Jader Filho, and Mayor Yvonne Aki-Sawyerr, leaders emphasised the importance of multi-level cooperation at #WMS25 today.
