Umask My City

From sustainable urban transport and active travel initiatives to renewable energy alternatives to fossil...

Health professionals urge authorities to fight pollution & unmask cities

Air pollution is driving a global public health crisis. It is responsible for one...

Historic climate agreement reflects real world change, protects vulnerable people

195 countries reached across traditional divides today to unite behind the greatest moral challenge...


Humanity's success in overcoming climate change depends on key decisions being made in countries and communities around the world right now: urban development plans, infrastructure investments, policy choices, and a host of other issues being tackled by organisations and community groups every day.

Human activities don't take place in a bubble – everything affects the world's climate. The most impactful climate policies are often practical solutions to improve public health, build stronger economies and enhance quality of life in ways that benefit everyone. Organisations that are already tackling these issues have a unique opportunity to advance climate action in tandem with their own mission.

Seasoned in global campaigns, mass mobilisations and strategic communications, GCCA works in partnership with organisations to help them realise the full potential of their work. We build capacity through hands-on support, from strategy through execution, and rally a worldwide network of partners and individual influencers to your cause. By working together we can grow your impact and advance your mission while at the same time accelerating solutions to climate change.

Build Capacity

Cultivate existing staff and fill gaps with embedded campaigners who speak your language and know how to fit climate into your agenda.

Influence at Scale

Develop and implement strategies that mobilise your base, attract new audiences, and move other stakeholders to action.

Mobilize Networks

Identify and connect with like-minded influencers within your community and across the world to increase the reach and impact of your initiatives.

Change the Narrative

Tap our network of passionate communicators to help you have your say and change the way people understand the links between your cause and climate solutions.


GCCA supports new voices in the climate debate by working with partner organisations to build campaigns tailor made for their audiences.

We support health professionals demanding clean, safe air in major cities around the world.


We work together with OKC, a growing international coalition of parent and grandparent groups from around the world who have come together to demand bold action to protect the children we love from catastrophic climate change.



The Tree is the GCCA’s flagship communications project aimed at
deepening and broadening the global debate on climate change.

The Tree’s mission was to build a diverse and international network of influential messengers working together to shape the discourse on climate change at global and regional levels, and to create the momentum required to accelerate the ongoing transformation from fossil fuels to renewable energies.

Access our archived Tree resources


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