One Planet City Challenge

2017-2018 OPCC participating countries

About the OPCC

When registering to the cCR, cities in selected countries [1] also have the opportunity to participate in WWF’s One Planet City Challenge (OPCC) which uses the cCR as its reporting platform. This biennial challenge run by WWF, in collaboration with ICLEI – Local Governments for Sustainability, encourages cities to commit to and implement ambitious climate action plans – the most ambitious cities are later recognized as national and global winners.

Founded in 2011, the OPCC [2] celebrates cities that implement innovative and ambitious climate actions, acting with urgency to deliver on the 2015 Paris Agreement. Combined with a focus on climate actions and related sustainability initiatives, cities are also encouraged to focus on improving social equity and quality of life. WWF’s aim with the OPCC is to encourage the creation of One Planet Cities – places where citizens can thrive and prosper, while respecting global ecological limits. The OPCC recognizes and rewards inspirational cities from around the world. To date, the OPCC has engaged over 320 cities in more than 25 countries across 5 continents – and its outreach and engagement continues to expand. Is your city willing to take the lead in the transition toward a one-planet future? Then we hope it will join the 2017-2018 OPCC!

The OPCC has several phases:

  1. Registration and reporting via ICLEI’s cCR platform
  2. Pre-screening of data submitted by cities
  3. Evaluation of up to 3 finalist cities per country and the consequent selection of national and global winners by an international expert jury [3]
  4. Public engagement campaign run by WWF to highlight the most impressive cities
  5. Award ceremonies that acknowledge national and global OPCC winners. Finalist cities are also celebrated and promoted on websites, films and in social media campaigns.

The 2017-2018 OPCC also has a thematic focus on urban transport and mobility. Thus in addition to national or global winners, cities with ambitious mobility plans and actions will be recognized separately for this.

Finally, WWF and ICLEI recognize that while data reporting is crucial for understanding the progress cities are making on climate action, we are also aware that it can be a time-intensive task. To avoid reporting fatigue, OPCC requirements align with those of major global initiatives for city reporting, such as the Compact of Mayors. As a result of this alignment, your city can also join the OPCC with minimal additional reporting requirements. This is a unique opportunity to gain recognition for the ambitious work your city is doing, and inspire cities around the world!

Interested to join? The OPCC reporting period runs from 15 March- 29 September 2017. For more information, consult the OPCC Instructions (below) or access the official OPCC website. You can also contact the One Planet Cities Core Team, at:

2017 - 2018 OPCC resources


Download the Reporting Instructions and begin reporting today!


Download the Reporting Instructions in Spanish and begin reporting today!


Let your city inspire the world!

View the OPCC 2017 brochure.

Download a print-ready version of the brochure.

Upcoming Webinars on the OPCC 2017-2018

4th Webinar for Cities OPCC 2017-2018 on the cCR
Language: English

5th Webinar for Cities OPCC 2017-2018 on the cCR
Language: English

Past Webinars on the OPCC 2017-2018

2nd Webinar for Cities OPCC 2017-2018 on the cCR
Language: English

3rd Webinar for Cities OPCC 2017-2018 on the cCR

Language: English

  • Session 1 on June 8, 2017 9:00 AM CEST
  • Session 2 on June 8, 2017 5:00 PM CEST

Webinar para ciudades candidatas Desafío de Ciudades_WWF 2017-2018: Reportar en el cCR
Language: Spanish

Segundo Webinar para ciudades candidatas Desafío de Ciudades de WWF 2017-2018: Reportar en el cCR
Language: Spanish

WWF City Challenge Digest 2016

In 2016, WWF’s One Planet Ciy Challenge (formerly the Earth Hour City Challenge) celebrated five years in the running! In this time over 328 local governments' have made ambitious commitments and reported on big win actions in the carbonn Climate Registry. Gain inspiration from collective progress and city case studies, thus far, in the 2016 WWF City Challenge Digest.

[1] See above for map of participating countries, or contact the WWF One Planet Cities Core Team, pending any changes at:

[2] The OPCC was formally called the Earth Hour City Challenge (EHCC). Its name was changed in 2017, to reflect wider ambitions, beyond Earth Hour. Still, cities are encouraged to use Earth Hour to highlight and celebrate climate actions in cities and towns.

[3] Jury members are international urban sustainability experts, representing research institutes, UN agencies, multilateral development banks and international city networks. WWF is in contact with the jury, but recuses itself from the selection of winners.