An open letter from C40 mayors

As mayors of some of the world’s great cities, we are committed to transforming them into greener, healthier, and more prosperous places to live. Our streets must be safe and accessible for everybody and our air must be clean and free from harmful emissions. This will improve the quality of life for all citizens, and help tackle the global threat of climate change.

We envision a future where walking, cycling, and shared transport are how the majority of citizens move around our cities. This shift towards zero emission mobility will result in less congestion and less pollution, while making our roads quieter and the air we breathe cleaner.

We are already delivering our vision of greener, healthier and more prosperous cities but we recognise the urgent need for ambitious climate action to achieve the goals of the Paris Agreement.

Today we have each signed a Declaration devised by the C40 Cities network to make the streets of our cities greener and healthier. By signing the C40 Fossil-Fuel-Free Streets Declaration, we pledge to work with our partners to procure only zero-emission buses from 2025 and ensure that major areas of our city are zero emission by 2030.

The transformation of our cities is already underway. Our commitment as mayors, to create streets, neighbourhoods and ultimately communities that all of our citizens can enjoy, has never been more urgent. This revolution will begin on our streets.


Anne Hidalgo, Mayor of Paris
Sadiq Khan, Mayor of London
Eric Garcetti, Mayor of Los Angeles
Frank Jensen, Lord Mayor of Copenhagen
Ada Colau, Mayor of Barcelona
Gregor Robertson, Mayor of Vancouver
Miguel Ángel Mancera, Mayor of Mexico City
Giuseppe Sala, Mayor of Milan
Tim Burgess, Mayor of Seattle
Mauricio Rodas, Mayor of Quito
Patricia de Lille, Executive Mayor of Cape Town
Phil Goff, Mayor of Auckland

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