4 ms·

According to the Wikipedia article, even using helium only reduces the lift by 14%...

• lsaferite 3y ago
  Isn't the objective to have livable space though? If the space is filled with helium or hydrogen then you cannot live in the space.
  • WithinReason 3y ago
    Filling it with a vacuum however...
    • lsaferite 3y ago
      Haha. Sorry, I was reading some of the links posted here where they talked about using slightly warmer air and must have gotten lost.