We’re running out of time: climate change is the single greatest challenge facing humanity. While budgets for international aid and climate action are being cut in key donor countries, we call on you to support solidarity levies. These innovative solutions can catalyse climate and development finance in line with the Baku to Belèm Roadmap’s goal of mobilizing $1.3 trillion until 2035 — at FFD4, COP30, and within the UN Framework Convention on International Tax Cooperation.

New data shows we’re already crossing the 1.5°C threshold of global warming — the time for half-measures is over. Climate and development crises are worsening at an alarming rate, marked by deadly hurricanes, searing heatwaves, and at least 343 million people suffering from acute hunger in 2025. Yet, while ordinary people bear the brunt of these disasters, the biggest polluters continue to rake in billions while paying next to nothing for the damage they cause.

Solidarity levies, designed to generate urgently needed funds, can help us finance climate transitions and development aid. Rooted in the principle of equity, these policies ensure that those with the greatest financial means and the highest carbon emissions contribute more to the shared responsibility. We urge world leaders to endorse the following options, as they offer unmatched potential and proven viability to raise new funds, all while contributing to social and economic justice.

Now is the time to act and to implement the solutions at hand. We must make a bold move towards climate and development finance and greater tax justice. We urge you to fully endorse the Global Solidarity Levies Task Force’s work, to work on levies to be adopted in coalition-of-the-willing formats at the Fourth Financing for Development Summit this June in Sevilla and at COP30 next November in Belèm, all while fully supporting the the UN Framework Convention on International Tax Cooperation.

Our future depends on your leadership — for our planet, and for generations to come.

Sincerely,

55,759 Global Citizens

47 NGOs representing 231 organizations around the globe

1. 350.org

2. A Sud

3. Accountability Lab

4. Action Aid International

5. Action Santé Mondiale / Global Health Advocates

6. Agronomes et vétérinaires sans frontières (AVSF) – France

7. Amref Health Africa (France)

8. APIT Portugal

9. Ban Ki-moon Centre for Global Citizens

10. CAFOD

11. Center for Economic and Social Rights (CESR)

12. Centre for Feminist Foreign Policy

13. Christian Aid

14. Coordination SUD

15. Don’t Gas Africa

16. ECCO – The Italian Climate Change Think Tank

17. EcoEquity

18. Entrepreneurship Initiative for African Youth (EIFAY Africa)

19. Equipop

20. FIACAT

21. Friends of the Global Fund Europe

22. Fundação SOS Mata Atlântica

23. Geledés – Instituto da Mulher Negra (geledés – black women institute)

24. Germanwatch e.V.

25. Glasgow Actions Team

26. Global Cooperation Institute

27. Global Policy Forum Europe

28. Global Witness

29. Green Economy Coalition

30. Greenpeace Africa

31. Greenpeace International

32. Innovea Development Foundation

33. Instituto Libio

34. JANIC

35. Loss & Damage Youth Coalition

36. Maison d’Assistance Locale aux Miséreux en sigle MALM

37. MENAFem Movement for Economic, Development and Ecological Justice

38. Norwegian Church Aid

39. Pandemic Action Network

40. Patriotic Millionaires UK

41. Project Everyone

42. SDG2 Advocacy Hub

43. Sharing Strategies

44. Tax Justice UK

45. The ONE Campaign

46. Think Equal

47. WWF-International

Two Distinguished Personalities:

1. Sabrina Elba, Model, Activist and UN Goodwill Ambassador

2. H.E. Stefan Löfven, Former Prime Minister of Sweden