Companies in the Soy (Manufacturing) industry are involved in the production of a variety of soy-based products. Soybeans are a versatile crop that can be processed into a range of products, including soy milk, tofu, soy sauce, and other food items. The industry also produces non-food products such as biodiesel fuel, industrial lubricants, and plastics. Soybeans are first cleaned and sorted before being processed into various products. The beans are then dehulled, which removes the outer layer of the bean, leaving the edible portion. The soybeans are then ground into a fine powder, which can be used to make soy milk or tofu. Soy milk is made by soaking the soybean powder in water and then straining out the solids. Tofu is made by coagulating the soy milk and pressing it into blocks. Soy sauce is made by fermenting soybeans with wheat and salt. The mixture is left to ferment for several months, during which time it develops a rich, savory flavor. Other soy-based products include tempeh, which is made by fermenting whole soybeans, and miso, which is made by fermenting soybeans with rice or barley. The Soy (Manufacturing) industry also produces non-food products such as biodiesel fuel, which is made from soybean oil, and industrial lubricants, which are made from soybean oil and other vegetable oils. Soy-based plastics are also becoming more common, as they are biodegradable and renewable.