In this episode, Lottie Dalziel speaks with Professor Mark Howden, Director of the ANU Institute for Climate, Energy & Disaster Solutions and Vice Chair of the Intergovernmental Panel on Climate Change (IPCC). He has been a major contributor to the IPCC since 1991, with roles in the Second, Third, Fourth, Fifth and now Sixth Assessment Reports, sharing the 2007 Nobel Peace Prize with other IPCC participants and Al Gore.