Interesting my wife and I enjoyed bubble green tea tonight and it made me wonder how you make tapioca so I looked it up and it looks like it could be a good survival food to grow although I don't know what environment is needs, sounds like it is native to south America but spread to many places in the world. It can be used for a lot of things including breads and gelatins. Tapioca - Wikipedia, the free encyclopedia "World War II During World War II, due to the shortage of food in Southeast Asia, many refugees survived on tapioca. The cassava plant is easily propagated by stem-cutting, grows well in low-nutrient soils, and can be harvested every two months, although it takes ten months to grow to full maturity. The plant provided much needed carbohydrates and other nutrients during wartime."