We are using stable isotopes of carbon, nitrogen, sulphur, hydrogen and oxygen, to elucidate global cycles. We are particularly interested in how forest and agricultural soils store carbon and how those stocks react to pollutants and fertiliser inputs. Using isotope tracing and fractionation models we track pollutants into the atmosphere and waterways. Moreover, we investigate how crops and soils react to extreme events of intense rainfall or drought, and work out which inputs or measures, lead to increased systemic resilience in face of climate change. Using the natural global patterns of multiple elemental isotopic signatures, we determine the geographical origin of what we eat and insect pests; ensuring food security and authenticity.