C40 Cities

"I’m proud that we are turning London into a wildlife haven and I'm committed to ensuring that London is at the forefront of reversing the trends of declining biodiversity."
@mayoroflondon.bsky.social @sadiqkhanlondon.bsky.social

The fund will also invest more than £12m over three years to help nature thrive across London’s communities.

A wilder London is now possible with the support of @mayoroflondon.bsky.social and C40 Cities Co-Chair, Sir @sadiqkhanlondon.bsky.social.

Mayor Khan’s Green Roots Fund has awarded £3.48 million to 26 environmental projects, 10 of which will support waterways.

For the first time in centuries, beavers will live in Barking’s waterways and help restore ecosystems...

...while white storks will nest in London again.

A headline from The Standard reads: "Sadiq Khan: "I want to rewild London. First storks, then beavers (yes, really)" White storks are coming back to London for the first time in 600 years.

Beavers and white storks are returning to London! 🦫🪶

⬇️🧵

#WorldWildlifeDay2026

Should cities sell public ad spaces to brands that harm our health?

History shows we can break the cycle of harmful advertising – just look at tobacco. On Cities 1.5, we explore how cities are ditching toxic ads for long-term planetary and public health: lnk.to/S6E4

No filter. No fluff. Just young leaders telling it like it is.

This special edition of the Cities 1.5 podcast hands the mic to the generation shaping the climate agenda now. Learn what's at stake for those growing up in the midst of the climate crisis: https://lnk.to/HotTakes2

Big thank you to Dewan Bandaraya Kuala Lumpur and Foreign, Commonwealth & Development Office for making this work possible.

4 years. 1 city. Real climate action.
Kuala Lumpur wraps C40’s UCAP CAI programme with a roadmap to greener buildings, a smarter digital portal for developers, energy upgrades that cut costs and improve comfort for residents, and stronger data tools for more impact: c40.me/4cxsuwR

A Valentine's Day card which reads: My love for you is like climate change. There's no denying it.

💘💘💘💘

#ValentinesDay #ClimateAction

A Valentine's Day card which reads: Are you a port city? Because I'd love to trade goods with you. and a graphic of a ship.

🚢💘

Are you a port city? Because I'd love to trade goods with you.

#ValentinesDay

A Valentine's Day card design which reads: "My love for you is like renewable energy. It's unlimited" with a graphic of a solar panel and the sun.

My love for you is like renewable energy... It's unlimited.

#ValentinesDay

A green upgrade for markets in Lagos 🇳🇬

The Ikosi Market Anaerobic Digester has launched. The goals? Simple.
1. Collect market waste
2. Turn it into clean energy
3. Power the community

Thank you to the UK and Nigeria for making this pilot possible: c40.me/lagos-c40-handover

A $10B fraud. 2 whistleblowers. On Cities 1.5, David Miller, Managing Director of the C40 Centre and former Mayor of Toronto, speaks with Lindsay Gulden about exposing Exxon’s fraudulent ways and the disinformation playbook behind it all. https://c40.me/3OwZpHT

A sign at the Super Bowl reads 'The only thing more powerful than hate is love'

That's it. That's the post.

Making cities greener through rewilding projects ⬇️

Bad Bunny points at the camera while performing at the Superbowl

Who can make a difference in the world?

#Superbowl

A picture shows Lady Gaga comforting Bad Bunny at the Grammys with the caption 'Cities without a climate plan' A second picture shows Lady Gaga and Bad Bunny smiling and dancing together with the caption 'Cities with a climate plan'

Cities with and without a climate plan

#superbowl

us naming the countries we want to work with to fight the climate crisis

#superbowl

A photo of the Jakarta skyline with bold white text which reads "JAKARTA"

Jakarta's leadership shows how megacities can take action to eliminate pollution.

With the support of the UK, Jakarta is transforming its skyline through new Green Building regulations: a blueprint for systemic change and urban innovation.

c40.me/3O7Rtg8

We asked mayors and climate experts about how C40 helps protect the people and places we love, and what their hopes for future are.

Together with cities, we're advancing climate action around the world.

When you find out that Amsterdam has officially banned fossil fuel advertising

#GRAMMYs

bees returning to cities after major rewilding projects

Doechii stands on the red carpet at the Grammys. She is wearing a purple dress with a long train.

I came by train

#GRAMMYs

When I go online and see the news (good)

#GRAMMYs

Bad Bunny holds his head in his hands

When I go online and see the news (bad)

#GRAMMYs

How it feels to win an argument against a climate denier

#GRAMMYs

Political turmoil is on the rise, but cities are not giving up. The focus remains: protect the people and places we love.

Tune in to Cities 1.5 to hear from Mayor of Austin Kirk Watson & http://mayorkwilson.bsky.social/ on embracing practical, community-centred climate action: https://lnk.to/S6E2

An image of three men in formal attire standing side-by-side in a modern indoor setting with dark wood paneling. From left to right: Mark Watts, Executive Director of C40 Cities, wearing a black suit, grey tie, and a small green lapel pin. António Guterres, Secretary-General of the United Nations, wearing a dark suit and a red patterned tie. Sadiq Khan, Mayor of London, wearing a navy blue suit and an open-collared white shirt.

We must end the fossil fuel era.

UN Secretary-General, António Guterres, knows this better than anyone. I want to thank him for his steadfast climate leadership and his commitment to phasing out fossil fuels. A pleasure to meet today together with C40 Cities Co-Chair, Mayor of London Sadiq Khan.

Can we design a city that benefits everyone?

S6E1 of Cities 1.5 kicks off with the mayors of Milan, Ekurhuleni, and Rotterdam & Leonora Grcheva from @doughnuteconomics.bsky.social discussing urban economies for a climate-first future: https://lnk.to/S6E1