In the first episode of our two-part World Mayors Summit special, we heard from mayors around the world about the power of convenings like the Summit to unite city leaders and spark collaboration. In this second episode, we explore what that collaboration looks like in practice, from new approaches to urban planning and the challenge of energy-hungry data centres, to fossil-free trucks and greener and cleaner shipping routes.

We also explore the outcomes for cities that came out of COP30 with voices from people who were on the ground in Belém…and also from a Brazilian climate leader who had a front-row seat before, during, and after what many have been calling the most important COP since the Paris Agreement.

Photo credit: © C40 Cities

Special thanks to Pauline Eloi, Director of the Executive C40 Office and Yasmin Calandrini, Manager, CHAMP National Engagement, for their on-the-ground support in Rio for the production of this episode.

Featured guests:

Kirk Watson, Mayor of Austin, USA

Carola Schouten, Mayor of Rotterdam, Netherlands

Nick Reece, Lord Mayor of Melbourne, Australia

Christiana Figueres, Founding Partner of Global Optimism and Co-presenter of Outrage + Optimism

Ilan Cuperstein, C40 Regional Director for Latin America and Head of International Relations for the City of Rio de Janeiro, Brazil

Mark Watts, Executive Director of C40 Cities

Lars Weiss, Lord Mayor of Copenhagen, Denmark

Eduardo Pimentel, Mayor of Curitiba, Brazil

Eirik Lae Solberg, Governing Mayor of Oslo, Norway

Dr. Nasiphi Moya, Mayor of Tshwane, South Africa

Links:

Outrage + Optimism - Inside COP

Learn about the many versions of COP30's "Global Mutirão"

Winners: Clean, Reliable Transportation (Oslo Fossil Free Trucks)

Tshwane C40 Cities regional sustainability masterclass

The Environmental Cost of Data Centers

COP30 Local Leaders Forum Statement

83 Countries Join Call to End Fossil Fuels at COP30

If you want to learn more about the Journal of City Climate Policy and Economy, please visit our website: https://jccpe.utpjournals.press/

Cities 1.5 is produced by the University of Toronto Press and the C40 Centre, and is supported by C40 Cities. You can sign up to the Centre newsletter here. https://thecentre.substack.com/

Cities 1.5 is hosted by David Miller. It's written and produced by Peggy Whitfield and Jess Schmidt: https://jessdoespodcasting.com/

Our executive producer is Chiara Morfeo.

Edited by Morgane Chambrin: https://www.morganechambrin.com/

Cities 1.5 music is by Lorna Gilfedder: https://origamipodcastservices.com/

In this first instalment of our two-part special from the C40 World Mayors Summit, Cities 1.5 takes you inside the flagship gathering of the world’s most ambitious urban climate leaders. We hear directly from mayors as they unveil this year’s Offer of Action – a unified commitment that raises the stakes for urban climate leadership and pointedly challenges national governments to match their ambition with action of their own, all on the eve of COP30. We also speak with leading climate experts and C40 partners to explore why cities remain the most effective engines for rapid, equitable decarbonization, and what they must do next to keep the goal of limiting global heating to 1.5°C alive. And crucially, funders share why they’ve chosen to invest in C40’s global network, highlighting the proven impact of coordinated city action and the urgency of scaling it.

Photo credit: ©Bernardo Jardim Photography

Featured:

Sir Sadiq Khan, C40 Co-Chair and Mayor of London

Nick Reece, Lord Mayor of Melbourne

Giuseppe “Beppe” Sala, Mayor of Milan

Yousef Al-Shawarbeh, Mayor of Amman

Keith Wilson, Mayor of Portland

Dr. Nkosindiphile Xhakaza, Executive Mayor of Ekurhuleni

Eduardo Pimentel, Mayor of Curitiba

Caterina Sarfatti, Managing Director of Inclusion and Global Leadership at C40

Haris Doukas, Mayor of Athens

Eirik Lae Solberg, Governing Mayor of Oslo

Søren Staugaard Nielsen, Managing Director of the Ramboll Foundation

Jo Jewell, Director of Social Responsibility Partnerships at Novo Nordisk

Hon. Catherine McKenna, Chair of the UN Secretary General’s High-Level Expert Group on Net-Zero Commitments of Non-State Entities

Christiana Figueres, Founding Partner of Global Optimism and Co-presenter of Outrage + Optimism

Links:

C40 World Mayors Summit: Cities Delivering Global Leadership for Climate Action - Bloomberg Philanthropies, YouTube

C40 World Mayors Summit

From negotiation to delivery:The Yearly Offer of Action

Ramboll Foundation

Novo Nordisk

Cities for Better Health

Green and Thriving Neighbourhoods Programme

Integrity Matters: Winning the Future report

Outrage + Optimism - Inside COP podcast

If you want to learn more about the Journal of City Climate Policy and Economy, please visit our website: https://jccpe.utpjournals.press/

Cities 1.5 is produced by the University of Toronto Press and the C40 Centre, and is supported by C40 Cities. You can sign up to the Centre newsletter here. https://thecentre.substack.com/

Cities 1.5 is hosted by David Miller. It's written and produced by Peggy Whitfield and Jess Schmidt: https://jessdoespodcasting.com/

Our executive producer is Chiara Morfeo.

Edited by Morgane Chambrin: https://www.morganechambrin.com/

Cities 1.5 music is by Lorna Gilfedder: https://origamipodcastservices.com/

Cities 1.5 is back with a special two-part series focused on the C40 World Mayor's Summit in Rio de Janeiro, convening just ahead of the upcoming COP30 in Brazil. City mayors are continuing to play a critical role in combating climate change as they implement substantial climate policies and actions amidst the inaction of national governments. Tune in to hear behind-the-scenes discussions with funders, policymakers, and mayors who are committed to cutting emissions, creating green jobs, and safeguarding their communities…all in the face of the accelerating urgency of the climate crisis.

Featured:

Sir Sadiq Khan, Mayor of London, England and co-chair of C40 Cities

Yvonne Aki-Sawyerr, OBE, Mayor of Freetown, Sierra Leone and co-chair of C40 Cities

If you want to learn more about the Journal of City Climate Policy and Economy, please visit our website: https://jccpe.utpjournals.press/

Cities 1.5 is produced by the University of Toronto Press and the C40 Centre, and is supported by C40 Cities. You can sign up to the Centre newsletter here. https://thecentre.substack.com/

Cities 1.5 is hosted by David Miller. It's written and produced by Peggy Whitfield and Jess Schmidt: https://jessdoespodcasting.com/

Our executive producer is Chiara Morfeo.

Edited by Morgane Chambrin: https://www.morganechambrin.com/

Cities 1.5 music is by Lorna Gilfedder: https://origamipodcastservices.com/