One Planet City Challenge | WWF

Join WWF’s One Planet City Challenge and inspire the world!

“Cities are where the battle for sustainable development will be won – or lost if we fail.” – Former UN Deputy Secretary General Jan Eliasson


If we do nothing, temperatures could rise 2 °C or even 3 °C by 2050. Unchecked, climate change threatens to undo much of the economic and social progress achieved since the end of World War II. Limiting global warming to 1.5 °C in line with the Paris Agreement is much safer for people and the planet. Taking action now is less costly than taking action later. But there is absolutely no time to loose, and cities offer a place to start. By acting locally, we create global leadership. Our vehicle is the One Planet City Challenge. Join it.

We support cities and their citizens to be part of a climate-safe future

We assess and guide local governments towards a 1.5 °C future. We also help with outreach to city stakeholders and engage with citizens to strengthen their communication with their local government.

If you want your city to do its bit to ensure a safer future climate, ask your city officials to join.

Whether you are a citizen or an urban decisionmaker you can influence positive change. At this point in time, your voice is more important than ever before.

Why cities?

Over half of the world’s inhabitants live in cities, and urbanization marches on. Cities account for 70% of carbon emissions and generate more than 80% of global GDP. In cities, problems tend to multiply, but they are also important testbeds, and multipliers, of solutions. As centers of both political and corporate power, cities can lead the climate transition.

These are some reasons why WWF created the One Planet City Challenge (OPCC). Through it we help local governments slash their carbon emissions.

OPCC – a global agenda for 1.5 °C in cities

WWF’s One Planet City Challenge in short:  

  • It’s a friendly competition to mobilize cities to deliver on the Paris Agreement.
  • We aim to support and celebrate 100 cities with action plans for 1.5 °C by 2020. The world is yearning for transformational leadership to discover how the transition can be done.
  • OPCC is the largest and longest running competition of its kind. More than 400 cities on 5 continents have participated at least once.
  • Participants have already raised ambitions in global reporting initiatives by reporting more than 5,700 actions with a total of 3.9Gt GHG emissions reduction potential by 2050. 
  • With the OPCC’s new unique and expert-verified methodology, we have integrated IPCC data from the Special Report on Global Warming of 1.5 °C.
  • Participating cities will report emissions, goals and targets on standardized reporting platforms.
  • The participants’ data will then be assessed and compared to the emission reduction trajectories recommended for their type, in order to limit global warming to 1.5 °C.
  • We then guide cities to the most impactful actions they can take to cut their emissions and align with 1.5°C
  • Winning cities should develop best practice and be strategic in their climate mitigation and adaptation plans.
  • The updated OPCC runs in collaboration with city networks such as the Global Covenant of Mayors, ICLEI, C40 and CDP.

OPCC – How it works

  • The city decides to join! If you want your city to accept our Challenge, ask your city officials! You have influence, and your voice is important!
  • Let us know! If you don’t have a local WWF contact, send us an email and we will direct you to the right person
  • Cities report relevant data on global standardized city-data reporting platforms. WWF offers guidance.
  • Registration opens on 12 February and closes 10 July 2019.
  • Based on the data entered, cities are prescreened and shortlisted.
  • We select up to 3 finalist cities per country.
  • Finalists can participate in our renowned global public engagement campaign, We Love Cities, in spring 2020.
  • An international jury of urban sustainability experts selects national OPCC winners with the most ambitious and inspiring commitments and actions, based on reported data.
  • The jury selects one global OPCC winner.
  • Our winners are celebrated in a global award ceremony mid-2020.
  • All participating cities receive guidance from global experts on big-win impact reductions in line with 1.5 °C.




WWF's One Planet City Challenge 2019/20 is currently open to local governments in the following countries. The populations of these countries represent 66% of all people on our planet.




© Desafío de Ciudades

In 2018, 50 cities across 5 continents – representing over a 100 million citizens – participated in the We Love Cities campaign.

Read about the We Love Cities Campaign


Sofia Widforss Poignant

Lead, One Planet City Challenge, WWF Cities