Hyellai Pona School of Geography, Earth and Environmental SciencesPhD student Contact details AddressSchool of Geography, Earth and Environmental SciencesUniversity of Birmingham Edgbaston Birmingham B15 2TT UK Hyellai Pona is a PhD candidate in Environmental Health Sciences, supervised by Prof Roy Harrison, on a project entitled: "Cross-sectional studies of air pollution and health." Doctoral research SupervisorProfessor Roy Harrison