Andy Haines was Dean (subsequently Director) of the London School of Hygiene & Tropical Medicine for nearly 10 years until October 2010 and is currently Professor of Environmental Change and Public Health. He was a family doctor in inner London for many years and formerly Professor of Primary Health Care at UCL. His international experience includes a secondment at WHO Geneva and work in Jamaica, Nepal and the USA. He has been a member of many national and international committees including the UN Intergovernmental Panel on Climate Change (on 3 occasions), the UK DFID Research Advisory Group (latterly chair) and the WHO Advisory Committee on Health Research. He was chair of the Rockefeller Foundation/Lancet Commission on Planetary Health and led several Lancet series including the 2009 Lancet series on the ‘Public health benefits of strategies to reduce greenhouse gas emissions’. He is currently a member of the Sustainable Development Solutions Network Leadership Council, the Scientific Advisory Panel of the Climate and Clean Air Coalition and the Rockefeller Council on the Economics of Planetary Health. His research interests focus on the linkages between health and natural systems and the health (co-)benefits of ‘low carbon’ policies, including sustainable healthy cities and food systems.