What elements of the cycle of matter do we find on the International Space Station?

To date, scientists have not succeeded in the circulation of substances in orbital stations. The decisive role in creating the circulation of substances in such expeditions is assigned to the processes of biosynthesis. The functions of supplying the crew with food, water and oxygen, as well as removing and processing metabolic products and maintaining the required parameters of the crew’s habitat on a ship, station, etc. are assigned to the so-called life support systems (LSS): gas composition supply systems, supply systems water, waste disposal systems, etc.

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