This lecture discusses the process of mushroom cultivation, focusing on the relationship between mycelium and its environment. The instructor explains how mushrooms grow in various conditions, emphasizing the importance of factors like temperature, light, and humidity. The lecture outlines the stages of mushroom growth, starting from mycelium and leading to fruiting, while highlighting the differences between saprotrophic and mycorrhizal mushrooms. The instructor also explores the concept of urban foraging, suggesting that unused urban spaces can be repurposed for mushroom cultivation. By examining the parallels between mushrooms and urban environments, the lecture raises questions about how to interact with these spaces and integrate non-human elements into our ecosystems. The discussion includes insights on the challenges of mushroom farming, such as contamination and environmental control, and concludes with reflections on the broader implications of cultivating mushrooms in urban settings, advocating for a symbiotic relationship with nature.