This week, we're looking at some of the ways bacteria cooperate with other organisms to break down plants. First we speak with Dr. Lisa Karr, Associate Professor of Animal Science at the University of Nebraska-Lincoln, and get into the details of how rabbits and cows ferment their food. And Mark Stumpf-Allen, Compost Programs Coordinator for the City of Edmonton, has some practical tips to help you keep your compost pile and soil alive and happy.