Rosie explores the links between nutrition, environment and health, especially sustainable diets and food systems. She sits on the management group of the LSHTM Centre on Climate Change and Planetary Health which co-ordinates interdisciplinary research relating to climate change and health. In 2020 she was on the scientific panel for the UK Climate Assembly which reported back to the UK government with policy recommendations for reaching net zero by 2050. She is currently a co-PI on two Wellcome-funded grants: the Pathfinder Initiative exploring health impacts of actions to mitigate climate change, and the FACE-Africa project exploring food system adaptations to climate change in The Gambia.  She is also a co-investigator on the NIHR-funded AMPHoRA project exploring health impacts of agricultural air pollution, and the Wellcome-funded SHEFS project researching sustainable and healthy food systems in India, South Africa and the UK.