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!!FridgeBrilliance:
* A common criticism of the MarsNeedsWater trope is that most material resources are abundant in asteroids and comets, but limestone is primarily produced from the compression of the remains of living organisms, not many places you'll find that in space.
* A common criticism of the MarsNeedsWater trope is that most material resources are abundant in asteroids and comets, but limestone is primarily produced from the compression of the remains of living organisms, not many places you'll find that in space.
