How Mushroom Farming Waste Could Benefit the Environment and Economy | Eater

"An urban-focused specialty mushroom company that operated large farms in Los Angeles, Austin, and New York and produced very large volumes of spent substrate (roughly 80–100 cubic yards per farm per week). The company employed staff specifically to find productive outlets for the material, but its recent bankruptcy removed a major, consolidated source of donated substrate for community programs — highlighting both the value of the material and the fragility of nascent secondary markets for a new agricultural byproduct." - Doug Bierend