About the ACA

About the Alliances for Climate Action


Alliances for Climate Action (ACA) are national coalitions of leaders from a range of sectors dedicated to championing their countries' rapid transition to net-zero-carbon economies.

These coalitions include leaders from state, local, and regional governments; companies and investors; civil society; academic and cultural institutions; tribal organizations; faith communities; and healthcare institutions. They have come together to address the climate crisis collaboratively - leading by example through climate action, reaching out to citizens in their country about the urgency and opportunity for climate action, and engaging with their national governments to help enhance and deliver on their countries’ climate pledges.

These ACA alliances are different from other platforms working on climate because they bring different subnational leaders together to work towards a common goal. They focus on accelerating climate action at the national level, where the transition to zero-carbon societies needs to happen. Their purpose is for participating institutions to collaborate with each other - recognizing that facing this global problem requires a synchronized, concerted effort within each country. And finally, they are all part of a global network with a unique added value - to foster peer-to-peer learning and bring a united voice of subnational actors to the global stage so that, together, we can inspire more institutions around the world to tackle the climate crisis through collaboration.


Why it matters?

The climate crisis affects all of us, and we all have a part to play in addressing this urgent problem. And it is urgent. We have roughly ten years to put in motion a profound transformation of the global economy and how it is powered, so that global emissions are cut in half by 2030 and reach net zero by 2050. The science is clear and paints an alarming picture of what lies ahead for if we don’t step up. Fortunately, the science is also clear on the actions required and together, we have the resources and technology to make the changes that are now needed.

ACA is a response to the urgent need for broad-based, national-level organizing that will champion this global transition. Global progress cannot be made at scale without combining bottom-up action with international engagement that will motivate national governments and all other institutions to move collectively toward the goals of the Paris agreement.

Coordinated action by local leaders can accelerate the speed of change, inspire others to join the groundswell of climate action, and highlight opportunities to shift more assertively than previously thought possible.


How it works?

ACA coalition members work together in a wide variety of ways — in-person and virtually, in small-group encounters and large public fora. They participate in many activities that form three main pillars of work:

1. Taking direct action on climate

ACA coalitions offer a space for members to share ideas on how each one is working to reduce their respective carbon footprint and identify new areas in which they can collaborate through joint activities to make faster progress together. Alliance members also encourage new institutions to join the alliance and become active partners in taking climate action in their countries.

2. Building public support for addressing climate change

ACA coalitions build public awareness of, and support for, climate action at home and internationally. At home, they ground the urgency for climate action and the benefits that such actions bring on the context and needs in their own countries. Internationally, they work with sister coalitions to build the growing global momentum for the transition to zero-carbon economies.

3. Engaging national governments to strengthen climate policies

While we need people from every stripe to join in the effort to tackle the climate crisis, national governments are critical to the success of these efforts. Alliances reach out to national government representatives to lend their support for the delivery of their countries’ climate commitments, and encourage their governments to set more ambitious climate goals and policies that can accelerate the transition to zero-carbon economies.

As a global Network, Alliances for Climate Action also connects member coalitions so they can engage in peer-to-peer learning, networking, and knowledge-sharing to broaden and deepen the collective knowledge base and capacity for collaborative climate work. As this shared knowledge deepens and spreads, it fans creativity and innovation in climate action. The Alliances also come together on the global stage to showcase the actions that their members are taking, inspire more climate action and encourage national governments to be more ambitious.


Why collaborate?

Who are the members / signatories?

Click an alliance to learn more about members / signatories involved in each organization:

What do the members / signatories do?

• Collaborate with other alliance members to share ideas and plan climate action

• Organize and execute individual and joint action to further climate goals

• Encourage new actors to join the alliance and become active partners

• Reach out to national government representatives to encourage ambitious approaches

• Build public awareness and support of climate action domestically and internationally

• Engage in peer-to-peer learning, networking, and knowledge-sharing

Global Partners

“Mayors of the world’s greatest cities are committed to delivering on the highest ambition of the Paris Agreement and are delivering bold policies for a sustainable future. Collaboration with business leaders, states, regional governments and civil society is essential to delivering on this ambitious vision. C40 Cities is proud to join this important initiative to accelerate climate action in countries around the world.”
- Mark Watts, Executive Director, C40 Cities Climate Leadership Group
“While national governments are vital to the transition to low-carbon, it is through collective action and collaboration between companies, investors, cities, states and regions that we will reach the pace and scale needed to truly build a sustainable economy. Data and transparency are vital to this transition, with disclosure of environmental risk and impacts being the crucial first step for action. CDP holds the richest global dataset of self-reported environmental data from companies and cities around the world, and we are seeing unprecedented action. The transformation of the global economy is already underway. Now is the time to urgently accelerate this shift to meet the goals of the historic Paris Agreement.”
- Paul Simpson, CEO, CDP
The Climate Action Network (CAN) is a worldwide network of over 1300 Non-Governmental Organizations (NGOs) in over 120 countries working to promote government and individual action to limit human-induced climate change to ecologically sustainable levels. CAN members work to achieve this goal through information exchange and the coordinated development of NGO strategy on international, regional, and national climate issues.
- Climate Action Network Mission Statement
“The Climate Group brings together powerful networks of businesses and state and regional governments to accelerate climate action. We know that through effective collaboration at the subnational level we can shift global markets and policies towards a world of under 2 ℃ of warming.”
- Helen Clarkson, CEO, The Climate Group
“Ensuring a climate safe future requires cooperation at all levels. Avina is working with non-state actors and national governments to build multi-stakeholder partnerships and the new institutional frameworks needed for the implementation of the Paris Agreement. Our joint work with ACA and its members enable us to enhance scale, accelerate innovation and increase our impact building truly national movements for climate action.”
- Gabriel Baracatt, Executive Director, Fundación Avina.
When businesses, cities, states, civil society and others collaborate to build a cleaner future faster, governments are given greater confidence to pass ambitious climate policies, which in turn increase low-carbon innovation and investment. These ‘ambition loops’ will create unstoppable momentum toward a zero emissions future.
- Nigel Topping, CEO, WMB
“There’s a new face of climate leadership emerging from around the world: CEOs, university presidents, civil society and leaders from local government and indigenous communities. They are demanding climate action and partnering together to accelerate implementation in key countries. This is a global groundswell and we are all in.”
- Manuel Pulgar-Vidal, Leader, WWF's global climate and energy programme