You're a mature, rational adult who can face massive, existential problems head-on, right? Or is your brain more like a medieval dungeon: a deep dark place in which you chuck things you don't want to think about, and throw away the key? Uh-oh. My guest on this episode, the esteemed psychologist, TED talker and author Dr Renée Lertzman, thinks it's the latter - and she thinks it's about time you got them complex thoughts out. Renée tells me why most traditional climate chat is mor...