carbonn Climate Registry

Are you a leader? Join the first 200 committed cities in the Compact of Mayors

Following its first anniversary, the Compact of Mayors – the largest coalition of mayors and city officials tackling  climate change – has surpassed its milestone of 200 committed cities and towns. The Compact aims to mobilize the leaders who recognize that climate change mitigation and low emission development, as well as climate change adaptation, are imperative. Are you a leader too?

The Compact was established by the world’s global city networks – C40 Cities Climate Leadership Group (C40), ICLEI – Local Governments for Sustainability (ICLEI) and the United Cities and Local Governments (UCLG) – with support from UN-Habitat and the UN Secretary General’s Special Envoy for Cities and Climate Change, Michael R. Bloomberg.

By committing to the Compact and to tackling climate change, the leading cities and towns around the globe also commit to using a new robust reporting framework that allows the networks to track developments. This will help to identify where additional support may be needed to get and stay on track. Tackling climate change is not easy, yet absolutely necessary.

The 212 committed cities and towns will, within a three year period, report ambitious greenhouse gas (GHG) emission reduction targets and rigorous GHG inventories that comply with the latest standard (the GPC), as well as sharing their risk and vulnerability assessments. Ultimately they will submit climate action plans to guide implementation and monitoring of climate action.

Several Compact milestones have been achieved this year. In August, Rio de Janeiro (Brazil) was officially announced as the first Compact Compliant city. During the New York Climate Week in September, 10 cities reached full compliance: Buenos Aires (Argentina), Cape Town (South Africa), Copenhagen (Denmark), Melbourne (Australia), New York (US), Oslo (Norway), Rio de Janeiro (Brazil), San Francisco (US), Stockholm (Sweden), Sydney (Australia) and Washington, DC (US). This demonstrates that regardless of where in the world your city or town is based, following the robust reporting framework of the Compact is possible. Smaller communities are also being supported to achieve full compliance.  

ICLEI celebrated the commitment of 10 Basque municipalities in Spain, whose commitment was made possible by the support of the association UDALSAREA 21. The Basque Network of Municipalities for Sustainability informed its members about the importance of joining the Compact of Mayors and advocated for a joint commitment. On 10 October 2015, the municipalities of Amurrio, Areatza, Bilbao, Balmaceda, Donostia, Durango, Errentería, Legazpi, Tolosa and Vitoria-Gasteiz became the latest members of the Compact. This successful story highlights the power of regional and local networks in mobilizing their members and acting as a driving force to address climate change. These 10 news committed cities are reporting to the carbonn® Climate Registry, the central repository of the Compact of Mayors, starting their journey towards full compliance.

For more information on the Compact of Mayors, contact us at or visit the website

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