The carbonn Climate Registry is the voluntary and public reporting platform for local and other subnational governments, enabling these entities to report and monitor their climate and energy commitments, greenhouse gas (GHG) emissions performance, plans as well as climate change mitigation and adaptation actions.


The cCR supports cities, towns and regions in developing robust reporting practices that enhance transparency, accountability and credibility. The platform uses reporting tools consistent with global standards and protocols and encourages measurable, reportable and verifiable (MRV) local climate action.   


As reporting entities, local and regional governments also make use of opportunities for benchmarking to evaluate and improve performance. Those that report comprehensive and high quality data are recognized by the cCR and showcased as leaders in local climate action.


Data from the cCR shows the impact of local climate action and how this action could contribute to Nationally Determined Contributions (NDCs) and the realization of the goal set in the Paris Climate Agreement to remain well below a temperature increase of 2 degrees Celsius above pre-industrial levels. These reported results build the case for scaling up support for local climate action and also contribute to ICLEI’s global climate advocacy messaging. ICLEI uses this data to represent its network and all local and other subnational governments in the global climate negotiations, working with its partners in calling for support to scale up local climate action and raise global climate ambition.


Register and report to the carbonn Climate Registry! This is a free service offered to you by ICLEI. Show the impact of local climate action and help raise global ambition.


carbonn Climate Registry facts:

  • The cCR was launched at the World Mayors Summit on Climate in Mexico City on 21 November 2010.
  • It is operated by the Bonn Center for Local Climate Action and Reporting – the carbonn Center – hosted by the ICLEI World Secretariat in Bonn.
  • Currently there are more than 950 reporting entities (local and other subnational governments) from 82 countries, representing 717 million people, i.e. 9.5 percent of the global population and 17.5 percent of the world’s urban population.
  • The carbonn Climate Registry serves many important initiatives and projects with the underlying aim to strengthen reporting of local and subnational climate action. Each initiative addresses a specific target group and theme, with its own objectives. Here ICLEI works with many partners to accelerate and track the impact of local climate action.
  • The Registry is a prime data partner of the UNFCCC’s Non State Actor Zone for Climate Action (NAZCA) Platform.