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Mars-underground-city
A family considers an extraplanetary paradise.
  1. 2024:  The year Elon Musk plans to send the first humans to Mars to build a city.
  2. 117:  The amount of water, in gallons, the average New Yorker consumes each day.
  3. 2100: The year Miami will be lost to the sea given an average temperature increase of 3.6 F.