E3G (Third Generation Environmentalism) is an independent, non-profit climate change think tank founded in 2004 to accelerate the global transition to a low-carbon, climate-resilient future through strategic policy influence and coalition-building.135
The organization's mission centers on translating climate politics, economics, and policies into actionable outcomes, focusing on solutions rather than problems—a concept rooted in "third generation environmentalism," which builds on prior environmental efforts by emphasizing implementation across sectors like energy, finance, and diplomacy.345 Key activities include producing data-driven insights and scorecards on climate politics, brokering cross-sector coalitions (e.g., Powering Past Coal Alliance, Transition Plan Taskforce), advising governments and foundations, and publishing reports such as Degrees of Risk and Europe in the World to shape decision-making.123 E3G operates as a strategic hub, coalition broker, and thought leader, influencing outcomes in international negotiations, the EU, and bilateral engagements.12
Geographically, E3G maintains a global scope with offices in London (headquarters), Brussels, Berlin, and Washington, D.C., supporting work on climate diplomacy, energy transitions, and geopolitics worldwide.135 While its efforts span resource efficiency and low-carbon infrastructure—aligning with sustainable development—direct connections to affordable housing are limited, as its focus prioritizes energy phase-outs, public finance alignment (e.g., Green Investment Bank), and climate risk management over housing-specific initiatives.23
Leadership includes co-CEOs Nick Mabey and Shane Tomlinson, with Tom Burke as Chairman; founders were Nick Mabey, Tom Burke, and John Ashton.36 Since inception, E3G has driven impacts like Russia's Kyoto Protocol ratification and China's Low Carbon Zones covering 350 million people.3