In this episode, Bruce is joined by the Prof Rich Pancost, Director of the Cabot Institute in Bristol, to discuss various talk related to climate change and environmental issues. First up is an ingenious way to filter water using carbon from Jemma Rowlandson of Bath University. Then there is a talk about rhodaliths from Leanne Melbourne of Bristol University. Finally Jenny Horrocks of Durham University explains how information buried deep within the Antartica ice flows can reveal what our climate was like in the past.