Dr Timothy Lenton is a leading expert on climate change and earth system science at the University of Exeter.
Back in the 1990s, he started studying tipping points - those critical thresholds where small changes can lead to massive transformations - making him one of the first scientists in the world to study this form of planetary risk.
Known for his pioneering work in this space, he's now presented his research in the book Positive Tipping Points: How to Fix the Climate Crisis.
Dr Lenton speaks with Susie about how he sees the way forward - and why there is still hope.
Climate change expert Tim Lenton's book, Positive Tipping Points. Photo: Oxford University Press
