Hotter days, higher pollution, more dangerous weather events: all of this and more is physically changing us from the inside out, and we don’t even realize it. THE WEIGHT OF NATURE: How a Changing Climate Changes Our Brains by Clayton Page Aldern isn’t a book about climate anxiety—it’s a book about brain health and brain chemistry, and the physicality of our response in this organ to the climate crisis. We sit down with the author to discuss.