ISEH 2018, the 4^th International Symposium on Environment and Health was held in Shanghai during December 4-6, 2018, where NUI Galway was recognised as a co-organiser and Dr. Chaosheng Zhang was a co-Chair. The ISEH conference series was initiated by Dr. Chaosheng Zhang, School of Geography and Archaeology, NUI Galway in 2012 where the SESEH (Sino-European Symposium on Environment and Health) conference was held in Galway as the 1^st one of this conference series. ISEH 2020 will be held in Dublin during August 2-8, 2020, to be organised by NUI Galway.