Dr. Joeri Rogelj is Director of Research at the Grantham Institute at Imperial College and also at the International Institute for Applied Systems Analysis. He studies how societies transform towards more sustainable futures, connecting Earth sciences to policy. He publishes on 1.5°C pathways, UN climate agreements, carbon budgets and net zero targets. He is a long-serving author on authoritative science assessment reports of the UN Environment Programme and Intergovernmental Panel on Climate Change.