Equipping cities with evidence and practical guidance
C40 provides three complementary offerings, publicly available to everyone, to support cities’ climate action:
- C40 Research: Building the evidence base: Primary research using C40’s city network to demonstrate what works, quantify benefits, advance understanding on emerging issues, and provide mayors with credible data for securing funding and political support.
- C40 Knowledge Hub: Practical policy briefs and implementation guides: Accessible resources for city policymakers and practitioners covering everything cities should know about tried-and-tested approaches and emerging ideas, with breadth and depth across urban climate sectors.
- C40 Centre: The think tank for cities and climate: Peer-reviewed research developed with mayors, city practitioners, economists, and academics to explore the strategies needed to stop climate breakdown.
For cities wanting to design effective climate plans and put them into action
All cities, of every size and in every country, play a role in securing a climate-safe future. The C40 Knowledge Hub can help your city succeed. Find practical resources tailored for cities that digest the evidence and arguments, offering insight and advice from cities already delivering solutions.
Quantifying what works in cities
Original studies on topics such as climate budgeting, green jobs, air quality, transport, waste, and urban planning. Research provides mayors with credible data for securing funding and building political support for climate policies.
The think tank for cities and climate
Explores the economic and political strategies needed to stop climate breakdown and build resilient, equitable cities. Access the Journal of City Climate Policy and Economy and peer-reviewed research, as well as the Cities 1.5 Podcast and the C40 Centre newsletter.
Frequently asked questions
Who can access C40’s research and resources?
All content is freely accessible to anyone, regardless of C40 membership. City practitioners, policymakers, researchers, advocates, and residents can access implementation guides, research reports, and most C40 Centre publications without registration.
How do I find resources relevant to my city’s context?
The Knowledge Hub organises content by topic (transport, buildings, waste, etc.). While some resources are city- or region-specific, most content is globally applicable and includes advice for cities with different levels of power, capacity and experience. Good practice examples are offered throughout our implementation guides and other resources, as well as in dedicated case studies, to help you find examples from similar contexts.
What’s the difference between Research, the Knowledge Hub, and the C40 Centre?
Research produces original quantitative studies demonstrating what works. The Knowledge Hub captures existing research, expert insight, and experience from cities to produce practical, accessible guidance about what climate actions to prioritise and how to deliver them. The Knowledge Hub also hosts all publicly available C40 research, as well as curated resources from third parties. The C40 Centre develops links between the academic world and practitioners, particularly in progressive economic thinking, narrative and disinformation, and public health and climate. All three inform each other.
How often is new content published?
Research reports are published throughout the year as studies are completed. The Knowledge Hub adds new resources every month, captured in a monthly newsletter. The C40 Centre publishes the journal quarterly and releases two podcast seasons per year.
Related
Commitments by C40 cities to drive ambitious climate results and halve fossil fuel use by 2030.
Supporting cities to create ambitious climate strategies that deliver meaningful community benefits.
Cities worldwide are proving that climate action is most successful when equity and fairness are at the heart of every decision.
