C40 Cities
@c40cities.bsky.social
A global network of city mayors delivering urgent climate solutions. Protecting the people and places we love. 🌳🌍🌆💚
http://www.c40.org/
http://www.c40.org/
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
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
February 6, 2026 at 10:47 AM
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
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.
Together with cities, we're advancing climate action around the world.
February 4, 2026 at 4:18 PM
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.
Together with cities, we're advancing climate action around the world.
February 2, 2026 at 11:29 AM
bees returning to cities after major rewilding projects
February 2, 2026 at 11:27 AM
bees returning to cities after major rewilding projects
February 2, 2026 at 11:17 AM
February 2, 2026 at 11:06 AM
February 2, 2026 at 11:05 AM
February 2, 2026 at 11:00 AM
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
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
January 27, 2026 at 2:15 PM
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
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
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
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
January 14, 2026 at 10:35 AM
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
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
Hands up if you want even more good climate news in 2026 🙋
January 12, 2026 at 11:44 AM
Hands up if you want even more good climate news in 2026 🙋
As climate disasters wreak havoc on communities around the world, mayors of major US cities understand they must act to keep families safe, confront the rising costs of energy and extreme weather, and improve lives and livelihoods.
@mayorkwilson.bsky.social
@mayorkwilson.bsky.social
January 9, 2026 at 5:01 PM
As climate disasters wreak havoc on communities around the world, mayors of major US cities understand they must act to keep families safe, confront the rising costs of energy and extreme weather, and improve lives and livelihoods.
@mayorkwilson.bsky.social
@mayorkwilson.bsky.social
From 100+ leaders representing the US at COP30 in Brazil to the Bloomberg Philanthropies-led coalition covering the UNFCCC funding gap, local leaders are committed to delivering real solutions to protect their communities from the devastating effects of climate breakdown.
@kirkpwatson.bsky.social
@kirkpwatson.bsky.social
January 9, 2026 at 5:01 PM
From 100+ leaders representing the US at COP30 in Brazil to the Bloomberg Philanthropies-led coalition covering the UNFCCC funding gap, local leaders are committed to delivering real solutions to protect their communities from the devastating effects of climate breakdown.
@kirkpwatson.bsky.social
@kirkpwatson.bsky.social
But US cities, states, and other actors are refusing to let the nation be sidelined.
January 9, 2026 at 5:01 PM
But US cities, states, and other actors are refusing to let the nation be sidelined.
It's a self-inflicted blow to US residents' health, safety, and economic future. It fails to bring the benefits of cheaper, cleaner energy to the American people, fails to protect Americans from extreme weather, and fails to prepare the US for the jobs of the future.
@mayorgallego.bsky.social
@mayorgallego.bsky.social
January 9, 2026 at 5:01 PM
It's a self-inflicted blow to US residents' health, safety, and economic future. It fails to bring the benefits of cheaper, cleaner energy to the American people, fails to protect Americans from extreme weather, and fails to prepare the US for the jobs of the future.
@mayorgallego.bsky.social
@mayorgallego.bsky.social
🚫 A global crisis requires global courage - not a federal retreat.
President Trump's decision to withdraw from the UNFCCC and 65 international agreements is more than a policy shift; it is a reckless abandonment of global responsibilities that puts every American at risk.
President Trump's decision to withdraw from the UNFCCC and 65 international agreements is more than a policy shift; it is a reckless abandonment of global responsibilities that puts every American at risk.
January 9, 2026 at 5:01 PM
🚫 A global crisis requires global courage - not a federal retreat.
President Trump's decision to withdraw from the UNFCCC and 65 international agreements is more than a policy shift; it is a reckless abandonment of global responsibilities that puts every American at risk.
President Trump's decision to withdraw from the UNFCCC and 65 international agreements is more than a policy shift; it is a reckless abandonment of global responsibilities that puts every American at risk.
Manifesting a greener, fairer 2026 for all ✨
January 5, 2026 at 1:00 PM
Manifesting a greener, fairer 2026 for all ✨
At the World Mayors Summit, mayors shared their innovative solutions to fight the climate crisis and showed what’s possible through collaboration. ✨ 💫
@london.gov.uk @nicholasreece.bsky.social
@london.gov.uk @nicholasreece.bsky.social
December 29, 2025 at 5:03 PM
At the World Mayors Summit, mayors shared their innovative solutions to fight the climate crisis and showed what’s possible through collaboration. ✨ 💫
@london.gov.uk @nicholasreece.bsky.social
@london.gov.uk @nicholasreece.bsky.social
'Tis the season to watch some iconic films 🎄
December 24, 2025 at 10:22 AM
'Tis the season to watch some iconic films 🎄
300 mayors. 50 sessions. 1 shared purpose. To protect the people and places we love.
At the World Mayors Summit in Rio, mayors shared how they are delivering results in their cities.
At the World Mayors Summit in Rio, mayors shared how they are delivering results in their cities.
December 22, 2025 at 4:09 PM
300 mayors. 50 sessions. 1 shared purpose. To protect the people and places we love.
At the World Mayors Summit in Rio, mayors shared how they are delivering results in their cities.
At the World Mayors Summit in Rio, mayors shared how they are delivering results in their cities.
NEW: Cities 1.5 Podcast’s Hot Takes - Dispatches from the Frontlines of the Climate Crisis.
Cities 1.5’s first Hot Take focuses on a major move in Canada’s energy future and what it means for climate, cities, and the promises made to hold fossil fuel giants accountable. lnk.to/HotTakes1
Cities 1.5’s first Hot Take focuses on a major move in Canada’s energy future and what it means for climate, cities, and the promises made to hold fossil fuel giants accountable. lnk.to/HotTakes1
December 18, 2025 at 2:10 PM
NEW: Cities 1.5 Podcast’s Hot Takes - Dispatches from the Frontlines of the Climate Crisis.
Cities 1.5’s first Hot Take focuses on a major move in Canada’s energy future and what it means for climate, cities, and the promises made to hold fossil fuel giants accountable. lnk.to/HotTakes1
Cities 1.5’s first Hot Take focuses on a major move in Canada’s energy future and what it means for climate, cities, and the promises made to hold fossil fuel giants accountable. lnk.to/HotTakes1
December 12, 2025 at 4:21 PM
From London hitting clean air targets nearly 200 years early to Bangkok strengthening its targets, here are our 5 top moments from 2025, where cities around the world showed how they are delivering cleaner air and safer futures.
December 12, 2025 at 4:21 PM
From London hitting clean air targets nearly 200 years early to Bangkok strengthening its targets, here are our 5 top moments from 2025, where cities around the world showed how they are delivering cleaner air and safer futures.
Mayors are moving past talk and delivering real progress by committing to Yearly Offers of Action.
Our Co-Chairs are joining other city leaders to turn climate pledges into results.
@london.gov.uk
Our Co-Chairs are joining other city leaders to turn climate pledges into results.
@london.gov.uk
December 11, 2025 at 7:15 PM
Mayors are moving past talk and delivering real progress by committing to Yearly Offers of Action.
Our Co-Chairs are joining other city leaders to turn climate pledges into results.
@london.gov.uk
Our Co-Chairs are joining other city leaders to turn climate pledges into results.
@london.gov.uk