carbonn Climate Registry

The carbonn Climate Registry (cCR) is the world´s leading reporting platform to enhance transparency, accountability and credibility of climate action of local and subnational governments. It is designated as the central repository of the Compact of Mayors launched at the Climate Summit 2014.

What our Mayors say

"Today’s announcements – the Compact of Mayors, its standardized reporting process and public data portal carbonn Climate Registry, came out of an unprecedented collaboration among city networks."

Mayor Park Won-soon of Seoul, South Korea and a leader in ICLEI's Mayors network

"Via the new Compact, carbonn will reach out to a wider circle of governments to scale-up GHG emission reduction targets, increase focus on climate risks and adaptation plans and harmonize climate data with existing national, regional, global city reporting platforms."

Jürgen Nimptsch, Mayor of Bonn, Germany and host of carbonn and the ICLEI World Secretariat

Read the full text of the Compact of Mayors


14. October 2014

World Summit of Regions for Climate

R20 Regions of Climate Action founded by former Governor of California, Arnold Schwarzenegger organized on 10 and 11 October, the first World Summit of Regions for Climate in Paris. The event, hosted by the Region of Ile de...[more]

23. September 2014

At the UN Climate Summit, the Compact of Mayors shows unity and ambition to tackle climate change

Compact demonstrates global cities’ commitment to helping nations set more aggressive, transparent climate targets Associated new research shows cities’ current commitments have the potential to reduce GHGs by 13 Gigatons...[more]

Climate action transparency key to trustworthiness

New carbonn Climate Registry (cCR) report reveals that global voluntary reporting of local climate action triggers trustworthiness, access to finance...

Read more



3rd EcoMobility Alliance Workshop, 27 - 29 October 2014, Sydney

21-23 October 2014, Sydney, Australia [more]

Webinar: “Highlights of the UN Climate Summit for sub-national governments climate action"

17 October 2014, 18:00-19:00 Central European Summer Time[more]

User login

Enter your username and password here in order to log in on the website:

Don't have an account?