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CLIMATE ACTION IN MEGACITIES in partnership with ARUP and C40 cities

Project Team

The Lab team is engaged in delivering a series of key reports on the impact, challenges and possibilities of climate action by cities in the Climate Leadership Group (C40). This have thsu far included Powering Climate Action - the first report of the C40-ARUP Partnership geared towards understing the powers that cities hold for climate action - as well as the third edition of Climate Action in Megacities, C40's flagship report.


These reports are the first products of a three year global partnership between Arup and C40. Together, we hope cities, their partners and the wider community will receive this report as a firm call to action, to collaborate and move forward together to deliver the transformative action that is needed so urgently. the Lab is now engaged in suppirting this partnership with scholarly research.


Powering Climate Action analysed data from 66 cities in the C40 Cities Climate Leadership Group (C40). Within this data, it identifies typical power profiles that cities hold across 10 sectors, including transport, energy supply and water. We also observed a series of governance typologies that describe cities’ approaches to climate governance. The report illustrates contrasting power profiles and governance models in cities from across the globe, but also commonalities that highlight great potential for knowledge sharing between cities. The research indicates that cities are in a strong position to catalyse climate action, particularly in cases where they collaborate with other actors.

You can dowload Powering CLimate Action HERE as well as the Powering Climate Action's executive summary.

Climate Action in Megacities 3 (CAM 3.0) compiles and analyses data provided by 66 C40 cities in 2015, combined with previous data collected from cities in 2011 and 2013. The full database now includes nearly 10,000 climate actions taken by C40 cities during the past 5 years. Representing the largest and most long-term record of city climate action globally, CAM 3.0:


  • analyses climate action trends since 2011

  • highlights the critical role of networking and collaboration in cultivating city climate action

  • synthesises new data collected in 2015 on the costs of city climate action and the ways in which this action is being funded

  • provides an evidence base to encourage more investment in city climate action from the private sector and other investors 

  • investigates the direct benefits of city climate action, focusing on greenhouse gas emissions reductions

  • highlights cities’ acknowledgement of increasing climate change risks, and their commitment to adaptation as well as mitigation


Visit the CAM microsite for a more interactive overview of the findings in the report.


You can download CAM 3.0 HERE

"Climate Action in Megacities 3.0" shows that cities are showing tremendous commitment to tackling climate change. However, there is an enormous number of actions that are not yet being taken which could make an even greater impact on emissions reduction and climate resilience.

The Potential for Climate Action report, prepared by Arup and C40 in partnership with the Lab, presents evidence of cities’ potential for future climate action and establishes a framework to characterise the challenges that cities face. The report shows that political, regulatory and funding challenges are dominant across cities, and illustrates the role of collaboration, communication and coordination in overcoming complex challenges. The report:

  • Analyses the most important specific actions that major cities can take to cut carbon emissions, and identifies the challenges that need to be overcome if mayors are to achieve them.

  • Identifies 2,300 priority actions which, if fully implemented, could cut GHG emissions by 50MtCO2e in the next few years.

  • Illustrates that city leaders need to partner with other actors to overcome the challenges that surround these potential actions – especially national/ regional governments, and private companies. 

  • Calls for collaboration across sectors to identify the solutions that can be introduced to help cities accelerate and expand climate action.


You can download Potential for Climate Action HERE

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