In the Martian, explain Mark’s water solution
In the novel and film adaptation of "The Martian," Mark Watney, the protagonist, is stranded alone on Mars after his crew mistakenly believes he died during a severe storm and evacuates the planet. One of Watney's biggest challenges is finding a way to sustain himself in the long term. Given the limited resources available, one of his most crucial problems is obtaining enough water to survive.
Watney comes up with a creative solution using the limited resources at his disposal. He realizes that the Hab (Habitat) on Mars was designed to extract every trace of water from the crew's waste. By using the vessel's life-support system, he can recycle the water present in their urine, humidity in the air, and even the moisture in their breath.
To achieve this, Watney sets up a water reclaimer system to extract and separate the water from all these sources. He takes apart the equipment and reconfigures it to fulfill his purpose, ensuring that no contaminated water passes through. He even develops a bacteria-based fertilizer system, growing potatoes in Martian soil, which acts as a humidity source for water extraction as well.
This water reclamation and recycling system, although an unorthodox and somewhat unpleasant solution, provides Watney with the necessary water to sustain his survival on Mars. He diligently manages to extract enough water to maintain his hydration and utilize it for the growth of his potato crop.
Overall, Mark Watney's water solution in "The Martian" showcases his resourcefulness and determination to overcome the challenges of survival in an inhospitable environment by utilizing the available resources in an innovative and logical manner.