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If humanity was suddenly hit with a disaster that could threaten humankind itself (Asteroid, Comet, Supervolcano, etc) and assuming we would know about this event a few years in advance, would there be a contingency plan for humanity? (Like going underground, space colonization, etc)

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If humanity was suddenly hit with a disaster that could threaten humankind itself (Asteroid, Comet, Supervolcano, etc) and assuming we would know about this event a few years in advance, would there be a contingency plan for humanity? (Like going underground, space colonization, etc)	1