Which electricity generation and storage technologies are the best options for meeting our future energy needs in a low-carbon, low-cost way? In this first episode, Cormac meets Dr Marko Aunedi, an expert in energy system modelling whose research investigates cost effective decarbonisation of the electricity system. We find out about the electricity sector in the UK and how it has been undergoing widespread transformation, drastically reducing its greenhouse gas emissions, and what we might expect next.