City Solutions Platform

Supporting early engagement between cities and the private sector to accelerate the deployment of climate solutions


Leading cities around the world are searching for innovative solutions to the major sustainability challenges they face, ranging from adapting to the effects of climate change, to providing their citizens with low carbon energy, waste, water and mobility options. However, many cities face challenges when working directly with the private sector. 

C40 Cities Climate Leadership Group (C40), the Danish cleantech cluster CLEAN, and the International Cleantech Network (ICN) have launched the City Solutions Platform (CSP) as a way to support early engagement between cities and the private sector to accelerate the deployment of climate solutions.



The main objective of the CSP is to accelerate the development of climate solutions and support cities in adapting to climate change by facilitating early engagement between cities and solution providers. The City Solutions Platform aims to deliver the following:

  • Build a platform for public and private entities to work together to develop innovative and implementable city solutions on the global stage.
  • Create an inventory of appropriate engagement models according to specific city contexts and procurement rules and regulations.
  • Provide opportunities for greater international visibility of the innovative sustainable solutions developed by the participating cities.
  • Build a shared understanding of the nature of the problems faced by cities, the means available to the city to solve them, and the potential for climate action.
  • Develop innovative best-practice solutions for megacities that can be replicated across the network of C40 cities.
  • Act as a catalyst for deeper partnerships between global cities and leading sustainable solutions providers.


Accelerating the Deployment of Climate Solutions

A dedicated working group will be established for each city challenge, which will comprise a mix of city representatives, local and global solution providers, and other relevant stakeholders. Based on a detailed assessment of the city’s needs, working groups will develop a plan for engagement activities to be delivered during the duration of the project.

C40, CLEAN and ICN will support selected cities in delivering project-sponsored co-creation activities with solution providers i.e., workshops, hackathons, and pitch events, etc. The activities of the working groups will result in the development of innovative city solutions and will inform the city’s tender process. Furthermore, the project working groups will create an inventory of effective ways to support city-private sector engagement and related procurement models, which can be replicated across the C40 network. Finally, the collaboration and knowledge sharing among the working groups will lead to the formation of a global network of new city-private sector partnerships.


Pilot Cities

MelbourneRio de JaneiroSeattle and Sydney have been selected to participate in the first round of the City Solutions Platform. 

Through the CSP, pilot cities will address a variety of climate related challenges, leading to innovative solutions that can inspire other C40 cities.

  • The City of Melbourne will use the CSP to create innovative approaches to the drainage and flood management in an urban renewal area adjacent to central Melbourne (Arden Macaulay precinct). | Download Summary
  • The CSP will help the City of Rio de Janeiro in implementing innovative financial, social and environmental solutions to treat the organic fraction of its waste, which represents over 50% in weight of total household waste stream in the city. | Download Summary
  • The City of Seattle is looking to the CSP to assist in creating an equity-driven framework which allows the city to partner with technology firms that have a vested interest in developing innovative, high-tech, and data-driven mobility solutions that are accessible to people from all walks of life. | Download Summary
  • Finally, the City of Sydney will use the CSP to determine the most effective way to generate 50% renewable electricity by 2030, which is essential to achieving net-zero emissions by 2050. | Download Summary

Learn More

Read the Press Release

Download the Concept Note