In a recent report conducted by the United Nations Food and Agriculture, certain studies were reviewed to make suggestions about what foods are safe to eat if the standard fare is not available or somewhere like in an underdeveloped nation.
There is a lack of substantial food. Insects, such as caterpillars, for example, have some nutritional value. They also suggested fisheries where they raise fish for food. Edible fruits, nuts, mushrooms, bamboo shoots, and plants, such as orchids and succulent plants can be eaten. They also recommended utilizing building material, such as bamboo, bark fibers, and animal skins.
They have found that wild meat is a portion of edible food, but it depends on where you are. The primary purpose of the United Nations, Food and Agriculture Organization is to eliminate hunger, improve nutrition, and standards of living agricultural productivity.