The C40 Cities initiative works with cities across the world to “bold climate action, leading the way towards a healthier and more sustainable future”. It has a useful network around urban flooding.

The C40 has undertaken a useful Benefits Research programme. The aim is to equip “C40 mayors with the evidence and tools to make the case for a much greater speed and scale of action, supporting cities to unlock action and avoid false trade-offs.”

It is focused on climate action and consists of the following work streams:

1. Framing Benefits: Coordination, standardisation and mobilisation for global efforts on benefits research
2. Modelling Global Benefits: Demonstrating global benefits of inclusive climate action to reset the meta-narrative
3. Measuring City Benefits: Evidencing city and action-level benefits to equip cities with the data they need to establish a case for action
4. Communicating the Case For Action: Supporting cities to use the data to make the case effectively in order to secure political and financial support

There is a useful Benefits Research Programme summary