In this talk, Charlotte will cover how epidemiology and exposure science underpin the concept of the exposome, why exposomic research is necessary to investigate the non-genetic burden of disease, and the importance of understanding how cumulative exposures across a lifetime relate to health. I will show how exposomic research can be used to better understand the effects of green space (GS) and associated co-exposures, on health and wellbeing. Key findings from a scoping review on GS and mental health will be used to demonstrate the need for further research investigating the GS exposome, and I will use examples from a feasibility study to show possible methods for investigating the GS exposome.