Underground housing, underground businesses, etc. Would that be better for the environment + possibly save on energy costs? Also possibly safer in certain scenarios like tornadoes etc.

Potential issues that immediately come to mind are ventilation, earthquakes, and flooding. But it's not like underground dwellings/basements/etc. aren't a thing, so maybe those issues have been addressed in ways I'm not familiar with.

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[–] 10 points 3 weeks ago

Scarcity of livable land isn’t exactly an issue at this point in time to heavily warrant it.

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