Simon Lewis is Professor of Global Change Science at both University College London and the University of Leeds. He is author of over 160 scientific publications on how humans are changing the Earth system, with major discoveries including quantifying the globally significant carbon sink in intact tropical forests, including the first evidence from the Congo Basin, and mapping the world’s largest tropical peatland complex in the heart of the Congo Basin. He co-founded and co-manages the African Tropical Rainforest Observatory, the global data repository and management tool forestplot.net, and the CongoPeat network. He was elected a Fellow of the Royal Society in 2023.