carbonn Climate Registry

A global mechanism

The carbonn Climate Registry (cCR) is a mechanism for cities and local governments to make commitments to climate change mitigation and adaptation that the world can count on. It has been created by the Mexico City Pact.

Cities and local governments are invited to publicly register their voluntary commitments to greenhouse gas (GHG) emissions reduction and to periodically report on their actual emissions performance. The cCR is operated by carbonn to ensure that the data is measurable, verifiable and reportable. This makes the Registry consistent with the standards of the global climate regime.

“The carbonn Climate Registry will facilitate transparency and accountability of local climate actions and help local governments to demonstrate leadership in climate action. ”

Christiana Figueres, Executive Secretary, UNFCCC

The World Mayors Council, a key partner

Following the leadership of WMCCC members, many local leaders decided to embark their community in the cCR effort. Among the first pioneer cities (the one reporting all their climate data) are Mexico City, Durban and Copenhagen, from which the Mayors have personally pushed for this achievement.

The carbonn Cities Climate Registry (CCCR) was launched on 21 November 2010 at the World Mayors Summit on Climate in Mexico City under the auspices of the World Mayors Council on Climate Change and Club de Madrid. It is operated by ICLEI – Local Governments for Sustainability through carbonn® and suppported by the United Nations Environment Programme (UNEP), the Government of Mexico City, and United Cites and Local Governments (UCLG).

Why a need for registering local climate data?

To promote climate action that the world can count on.

Since 1992, local governments have shown leadership in addressing climate change and have actively driven, mirrored and supported the national and international climate process. In 2009, thousands of local climate commitments were presented by cities and local governments at the UN Copenhagen Climate Summit. Building on the Copenhagen World Catalogue of Local Climate Commitments, the cCCR enables cities to disclose their commitments and progress achieved in a standardized way that will allow comparability and verification of the local GHG emissions performance.


(Previously called the carbonn Cities Climate Registry)