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Why don't we build self-sustainable underground cities? Have we learned anything from the history of this planet? One way or another, surface life will perish one day. Doesn't mastery of the matter we have unlocked give us a chance to prepare for it? And just how much easier it would be to expand beyond the planet once we have figured out and practiced these technologies?
#UndergroundCities#SustainableLiving#FutureCities#SpaceColonization#ClimateChange#Survival#Innovation#Technology#HumanProgress#SpaceExploration#FutureTech#UndergroundLiving#Preparation
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how the hell do I change post background to black777
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