Hannah is Professor in Sustainable Energy and Energy Systems Modelling at University College Cork, Ireland. Her research and lecturing focus on modelling and developing sustainable pathways for the energy system, encompassing energy access, climate change and air pollution, and she engage extensively with policymakers, civil society and academia on those topics. As well as being a lead contributing author to several International Energy Agency World Energy Outlook reports and journal articles, she writes a regular column – “At a Time of Climate Crisis” – for the Irish Times.