Award-winning journalist and neuroscientist Clayton Page Aldern shows that the warming climate is not just affecting our planet – it is affecting our brains and bodies too. Drawing on seven years of ground-breaking research, Aldern documents a burgeoning public health crisis that has gone largely unreported. Eco-anxiety is just the tip of the iceberg. The rapidly changing environment is directly intervening in our brain health, behaviour, decision-making and cognition in real time, affecting everything from spikes in aggravated assault to lower levels of productivity and concentration, to the global dementia epidemic. Travelling the world to meet the scientists and doctors unravelling the tangled connections between us and our environment, and reporting the stories of those who are already feeling these shifts most keenly, Aldern shows how climate change isn’t just around us, but within us.