In his groundbreaking book, Traffication: How Cars Destroy Nature and What We Can Do About It, scientist and researcher Paul Donald synthesizes dozens of studies to help us understand what cars and roads do to living things. Paul makes the case that cars ruin more than cities—they also ruin the countryside by fragmenting habitat and creating a neverending barrage of threats and stressors for animals of all kinds. The danger posed by the car to nature, he suggests, is existential.

We talked with Paul Donald about his book, why he coined the term “traffication” and what he thinks we can do about it.

You can find the full transcript of this episode here.