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Can people on Mars survive?

The atmosphere of Mars is thinner than that of the Earth, of which 95% is carbon dioxide, 3% is nitrogen and 2% is argon. The equatorial surface temperature of Mars is-1 13℃ at night and 7℃ at most during the day. The average annual temperature of Mars is about-58 degrees Celsius. Oxygen-free atmosphere, freezing temperature and dry surface have become the three major obstacles for human beings to move to Mars.