Inside the mind of scientist James Lovelock

James Lovelock, who turned 100 this year, discusses his life’s work, including his latest theory that AI might be the key to saving the planet. And: former US ambassador Samantha Power on finding ways to make a difference in the face of daunting challenges. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>