CEEDS operates across a wide range of environmental and methodological themes, which represents the breadth of environmental data science at Lancaster University and UKCEH. Our 4 Environmental Themes are Air; Land & Soil; Water & Ice; and Biodiversity. Our 3 cross-cutting methodological themes are Data Acquisition and Infrastructure; Data Science Methods; and Decision Making under Uncertainty. We also have one integrative theme focussing upon Complex Systems. Central to the CEEDS philosophy is that these environmental and methodological themes intersect, so that (1) new knowledge can be shared, and (2) we embed a perspective of interconnected, rather than isolated, systems.