A “growing” sector of food production is mycology — the study of fungi — and mushroom farming. It’s a very energy-efficient way to grow nutritious food in a small space. Mushrooms are grown from spores that are inoculated into an inert medium, usually one that is made from composted agricultural materials which can go back into the waste cycle as a component of potting soil. The range of delicious mushrooms that can be grown includes the well-known white button, shitake, portabella, oyster, maitake, trumpet, and more. Some varieties of mushrooms have strong immunity-boosting and detoxifying properties, are high in vitamin D, and/or can be used as health supplements or extracted into tinctures.