Gavan was joined by Chris Rapley, Professor of Climate Science in the Department of Earth Sciences at University College London and author of '2071: The World We'll Leave Our Grandchildren'.
Together they discussed the possible outcomes of the COP26 summit, the logistics of how negotiations play out, the issue of some large and influential nations not taking part, and how the nature of the climate change debate has changed for the better over the course of the last few years.
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