On the eve of COP28 in Dubai, is the goal of limiting global warming to 1.5°C still alive? What does this mean and is it even possible? Given warming has reached 1.25°C, increasing at around ¼°C per decade, what happens if we miss our target? While every tenth of a degree matters, passing 1.5°C does not mean an inexorable slide into climate chaos, but every year’s delay increases the clean-up bill for future generations. This lecture was recorded by Myles Allen on 21th November 2023 at Barnard's Inn Hall, London. Myles is the Frank Jackson Foundation Professor of the Environment. He has contributed extensively to the Intergovernmental Panel on Climate Change (IPCC), including as Coordinating Lead Author for the 2018 IPCC Special Report on Global Warming of 1.5°C. He has published extensively on how human and natural influences on climate contribute to observed climate change and extreme weather risk, and the implications for adaptation and mitigation policy. https://www.gresham.ac.uk/speakers/professor-myles-allen The transcript and downloadable versions of the lecture are available from the Gresham College website: https://www.gresham.ac.uk/watch-now/degrees Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham's mission, please consider making a donation: https://gresham.ac.uk/support/ Website: https://gresham.ac.uk/ Twitter: https://twitter.com/greshamcollege Facebook: https://facebook.com/greshamcollege Instagram: https://instagram.com/greshamcollege