Food
Life support systems could include a plant cultivation system which allows food to be grown within buildings and/or vessels. However, no such system has flown in space as yet. Such a system could be designed so that it reuses most (otherwise lost) nutrients. This is done, for example, by composting toilets which reintegrate waste material (excrement) back into the system, allowing the nutrients to be taken up by the food crops. The food coming from the crops is then consumed again by the system's users and the cycle continues.
Read more about this topic: Life Support System
Famous quotes containing the word food:
“Most vegetarians I ever see looked enough like their food to be classed as cannibals.”
—Finley Peter Dunne (1867–1936)
“I believe that every man who has ever been earnest to preserve his higher or poetic faculties in the best condition has been particularly inclined to abstain from animal food, and from much food of any kind.”
—Henry David Thoreau (1817–1862)
“When no food is given to the ear,
Then let a little be given to the stomach.”
—Tiruvalluvar (c. 5th century A.D.)