C40 Cities

@c40cities

A network of city mayors delivering urgent climate solutions.

Protecting the people and places we love. 🌳🌍🌆💚

Global c40.org Joined August 2010

3.3K Following 111K Followers 34K Posts

Latest posts 5

Brazil is showing what climate action looks like 🇧🇷

Cities are bringing climate action into public budgets and building on the momentum of COP30.

c40.org/news/brazilian…

1:07

C40 Cities @c40cities Nov 2

Huge opportunities await businesses investing in green tech and infrastructure.

In @ClimateHome, @LordMayorMelb Nick Reece & Mayor of Renca @cn_castro detail why C40 cities are generating a green investment boom.

climatechangenews.com/2026/10/29/fro…

A quote from the Lord Mayor of Melbourne and the Mayor of Renca that reads: “When we talk about the green economy, we often think nationally... but much of the investment needed to deliver the green transition will be decided closer to home – in our cities.”

C40 Cities @c40cities Oct 26

Londonmaxxing at its finest.

Under the leadership of C40 Co-Chair and @MayorofLondon, one of the world's most famous shopping streets is putting people first.

@SadiqKhan

Text shows: Good news: Oxford Street in London is now traffic-free.

Background image of Oxford Street

C40 Cities @c40cities Oct 23

Water = life 💧

By introducing clean drinking water kiosks in underserved communities, C40 Co-Chair and Mayor of Freetown @yakisawyerr is tackling climate challenges, creating new jobs and protecting people from unsafe water.

@FCC_Freetown

1:19

C40 Cities @c40cities Oct 19

More trees, cooler streets and a city better prepared for extreme heat. 🌳

Through ‘Freetown the Treetown’, C40 Co-Chair @yakisawyerr is showing how a simple solution can make a big difference in the fight against rising temperatures in Freetown, Sierra Leone.

@FCC_Freetown

1:10