OUR MISSION
London Climate Action Week harnesses the power of London for global and local climate action.
An open and inclusive platform for action — and a public good — LCAW is one of the world’s largest independent climate events. Now in its eighth edition, it brings together more than 75,000 people across more than 750 events over nine days each June. From community gatherings in every London borough to major international conferences, ministerial roundtables and public art installations — climate action happening, visibly, across an entire global city.
Hosted by E3G — Third Generation Environmentalism.
WHY LCAW MATTERS
LCAW is a key moment in the global climate calendar — where climate action happens between COPs, where the UN Global Climate Action Agenda comes alive in cities and communities, and where the international climate community gathers to build the cooperation the formal process depends on.
Set at the midpoint of the diplomatic year — after the UN climate meetings in Bonn and before the world gathers at the UN General Assembly in September and annual climate COP in November — LCAW is where relationships form, coalitions build, and agendas are shaped.
LCAW brings people together in action and cooperation, harnessing the power of London for global and local climate action. Participation is open to all.
OUR IMPACT GOALS
LCAW works toward four impact goals:
1. Shaping global climate action including diplomacy towards the annual UN climate COP
As a key moment in the global climate calendar, LCAW shapes the global conversation on the politics and practicalities of climate action — connecting its programme to the formal climate process and to the UN Global Climate Action Agenda.
2. Aligning the London climate cluster to deliver new climate solutions
London is home to the largest concentration of climate-focused organisations in the world. LCAW generates synergies and collaboration across London’s unique ecosystem of globally active organisations — from commercial sectors to scientific, academic and non-profit institutions.
3. Delivering inclusive net zero and resilient climate transitions for and with London and UK
LCAW is an annual moment to audit progress and accelerate inclusive climate transitions for London and the UK — engaging people and communities in London in their city’s net zero and resilient future.
4. Building whole-of-society action
LCAW expands the range of organisations and people engaged in climate debate — reaching into education, culture, sport, faith and communities across London, and working with cities around the world to support similar climate action weeks.
lcaw and global climate action
LCAW works closely with the UN and the COP presidencies of Brazil, Türkiye, Australia and the Pacific and Ethiopia to connect the week’s programme to the UN Global Climate Action Agenda.
The Brazilian COP30 presidency has identified climate action weeks as a key platform for real-world implementation — an extension of the action agenda into cities and communities around the world. LCAW 2026 is a gathering point for many official Action Agenda initiatives. Events at LCAW connected to official initiatives are identified and searchable on the platform.
LCAW is the reference point for a growing international network of climate action weeks — New York, Shanghai, Bangkok, Sydney, Rio de Janeiro and beyond. Each week is independently organised, locally rooted and together they are globally connected.
THE ETHOS OF LCAW
The week belongs to the community that fills it. Events range from grassroots community gatherings and borough sustainability festivals to major international conferences, ministerial roundtables, public art exhibitions and rooftop parties — in parks, schools, firms, the London Stock Exchange, Westminster, Shoreditch and the Excel Centre.
The strength of LCAW is rooted in the grit and energy of London — and in the potential of cities as sites for creativity, connection and climate action.
history
London Climate Action Week was founded in 2019 by the Mayor of London and E3G. What began as a moment to bring London’s climate community together has grown into one of the world’s largest independent climate events — eight editions, eight years, a growing global network and a community of more than 75,000 people.
ABOUT E3G
E3G — Third Generation Environmentalism — is an independent climate change think tank with a global outlook. E3G animates and hosts London Climate Action Week and the secretariat that makes the platform possible.
