Volcanologist Professor Bill McGuire (Ïã¸ÛÁùºÏ²Ê Earth Sciences)Ìýdiscusses whether climate change will unleash geological mayhem, while Professor Nick Tyler (Ïã¸ÛÁùºÏ²Ê Civil, Environmental & Geomatic Engineering)Ìýtalks about the impact of ageing populations.Ìý