03 September 2025 marked an important milestone for global climate equity: the leading journal Nature published a groundbreaking study titled “Effect of discontinuous fair-share emissions allocations immediately based on equity.” Co-funded by Aroha, the study presents an innovative new framework for understanding how national climate efforts align with equity principles.
This research sits at the core of our ongoing commitment to advancing rigorous, justice-oriented climate science.
A Scientific Framework for Fair Share Responsibility
The study, led by Yann Robiou du Pont, Mark Dekker, Detlef van Vuuren, and Michiel Schaeffer, tackles one of the most challenging questions in global climate policy: How should emissions reductions be fairly distributed among countries?
Drawing on long-established principles such as responsibility, capability, and need, the authors introduce a so-called “discontinuous” allocation framework that evaluates countries’ mitigation responsibilities regardless of where their mitigation efforts are currently anchored. The study is global in scope spanning parties to the Paris Agreement.
A key finding of the study is that the current emissions targets of G7 countries, and a select number of major G20 economies account for most of the global 2030 ambition gap, as well as pinpointing those countries that are aligned with their fair 1.5 °C allocation. This highlights the critical role of high-emitting nations in closing the worldwide ambition gap but also shows that globally there are countries who are fulfilling their equitable share of effort.
Strengthening Climate Equity Through Evidence
Through its involvement in this study, Aroha underscores its long-term commitment to supporting research and policy advice that strengthens fairness, accountability, and ambition in global climate action. These insights help inform broader discussions on how countries can align their policies with what equity requires in a rapidly closing window for meaningful climate action. The framework will be meaningful in assessing global efforts in tackling the climate crisis going forwards.
We are proud to have supported this important work.
Read more here on Nature Communications → https://doi.org/10.1038/s41467-025-62947-9
