C40 Cities

New Subnational Advisory Council marks the first time national governments within CHAMP formally integrate subnational leaders’ perspectives and experiences into the coalition’s decision-making structure London, June 25th – The Coalition for High Ambition Multilevel Partnerships (CHAMP) for Climate Action announced the creation of its new Subnational Advisory Council, marking a historic step forward in strengthening cooperation between national, local and regional governments in the global...

Today, mayors, business leaders and climate experts came together across London to kick off London Climate Action Week 2026. From...

The climate and housing crises are making homes less safe, less secure, and more expensive. Increasing extreme weather and rising energy prices are affecting millions of people, with low-income communities often hit hardest. Increasing profiteering and land holding compound these climate impacts, but there are many solutions that exist including those led by cities.

Evidence shows the EU’s  know-how to engage with cities and regions to support climate delivery, reflecting global CHAMP good practices Brussels, Belgium, March 24th – The European Union (EU)’s vast experience on multilevel governance and partnerships indicates how climate pledges can turn into real-world results through closer cooperation with cities and regions, according to a new report launched by the Global Covenant of Mayors for Climate & Energy (GCoM) and C40 Cities.

First cohort of cities and states will receive support from C40 Cities and the Global Covenant of Mayors for Climate & Energy to deliver implementation-ready climate initiatives by 2027 Curitiba, Brazil, March 24th – C40 Cities and the Global Covenant of Mayors for Climate & Energy (GCoM) announced the first 34 cities and two states in Brazil selected to receive technical and finance-structuring support for climate action projects under the Brazil Mutirão Program.

The Jakarta Provincial Government, in collaboration with the British Embassy and C40 Cities, hosted today a landmark event at the Hotel Mandarin: “From Implementation to Integration: Securing Jakarta’s Climate Future”. It marks the official handover of the C40’s Urban Climate Action Programme (UCAP) Climate Action Implementation (CAI) programme, a major initiative funded by the UK Government to accelerate urban climate resilience.

Europe must take advantage of brownfield development’s potential to address affordable housing needs and reduce carbon emissions, a new report reveals 20 January 2026 – Brownfield development must play a role in enabling urban growth to meet the needs of Europe’s growing urban population, according to a new report from C40, Arup and Urban Partners.

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8 January, 2026 –  The US Federal Government’s decision to withdraw from the United Nations Framework Convention on Climate Change (UNFCCC) and 65 additional international climate, labor, and human rights agreements is a self-inflicted blow to the US and its residents.

The year 2025 marked a global shift from climate ambition to coordinated action across national and local governments. In 2025, the world marked ten years since the Paris Agreement and gathered in Belém for COP30. It also became a turning point for how climate ambition is delivered on the ground.