This weekend, psychotherapists, psychologists, philosophers, scientists and activists will come together to explore the traumatic reality of climate change. What can therapists contribute to the picture? And how might global warming be permeating our consulting rooms? Paul Hoggett, psychoanalytic psychotherapist and co-founder of the Climate Psychology Alliance, thinks we can help humankind understand it’s anxiety, anger, despair and denial – and outlines three key ways therapists can contribute to positive change.