# Hannah Ritchie Back to [[Authors/@BjornLomborg/People/People|Lomborg People]] · [[Authors/@BjornLomborg/BjornLomborg-x-profile|@BjornLomborg]] · Topic: [[Topics/Climate Change Science and Policy Debate/Climate Change Science and Policy Debate|Climate Change Science and Policy Debate]] **Role:** Researcher at Our World in Data (OWID) ⚠️ (current title not checked); data-led writer on climate, energy and development - Co-author, with Pablo Arriagada, of "How much development aid is spent on climate change?" (OWID, Oct 26, 2026), built from OECD Rio-marker data. The article reports that climate-related bilateral aid was ~$50bn in 2024: "a third of bilateral, project-specific aid", "almost one-quarter of all bilateral aid", and "around one-fifth of all development aid". It finds that over half of that went to projects where climate was only a secondary objective. - She credits Richard Tol for pointing her to the dataset. - It is the independent check in [[Authors/@BjornLomborg/Post Analyses/Post Analysis - BjornLomborg on Climate Share of Development Aid (2026-10-26)|Climate Share of Development Aid]]. Her conclusion is close to Lomborg's on the headline share, but she stresses that relabelling and displacement can't be separated.