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:
“Hume, and other skeptical innovators, are vain men, and will gratify themselves at any expense. Truth will not afford sufficient food to their vanity; so they have betaken themselves to errour. Truth, Sir, is a cow that will yield such people no more milk, and so they are gone to milk the bull.”
—James Boswell (1740–1795)
“Feed him ye must, whose food fills you.
And that this pleasure is like raine,
Not sent ye for to drowne your paine,
But for to make it spring againe.”
—Robert Herrick (1591–1674)
“To give money to a sufferer is only a come-off. It is only a postponement of the real payment, a bribe paid for silence, a credit system in which a paper promise to pay answers for the time instead of liquidation. We owe to man higher succors than food and fire. We owe to man.”
—Ralph Waldo Emerson (1803–1882)