Foodsource is a project of the Food Climate Research Network (FCRN) at the University of Oxford. Foodsource provides users with accurate, clear, accessible and agenda-free knowledge about food systems and sustainability. Foodsource consists of 10 chapters providing a clear, accessible, balanced and scientifically robust overview of the many interlinked social and environmental issues related to our food system. Foodsource is free to all to use: we hope it will be of interest to students, teachers, lecturers and researchers who need a reliable source of information to draw on for their studies or lectures. It is also intended to be used by civil society organisations, food industry and policy makers.