Contributor(s): Professor Michael Grubb | Professor Grubb assesses lessons from 20 years of debate on technology, economic dimensions of global energy and environmental problems from corresponding policy efforts. Michael Grubb is Professor of International Energy and Climate Change Policy at University College London. Alex Bowen is Principal Research Fellow in the Grantham Research Institute on Climate Change and the Environment at LSE. Credits: Tom Sturdy (Audio Post-Production), LSE AV Services (Audio Recording).