Microbes
Microbes are microscopic organisms. On Earth microbes live almost everywhere: in soil, in water, even inside animals. On Mars there are no known microbes. The environmental conditions seem not to allow them to survive on the Martian surface. Subsurface environments, however, may be favorable to microscopic life.
Future settlers will bring microbes from Earth to Mars. They will live inside greenhouses, humans, and animals. Microbes are essential for many atmospheric processes, including the Nitrogen Cycle.
Microbes can be used in biotechnological factories to produce chemical substances, for instance, proteins.
See Also
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