Seed Banks, Seed Vaults

[Axtremus]

https://www.sciencefocus.com/planet-earth/worlds-largest-doomsday-vault-seeds

Long article on "seed banks," very high security, very low temperature (even cryogenic) "vaults" storing large amount and large variety of seeds. Seeds of important food plants, rare/near-extinct plants, etc. Things to "restart" the food supply or replant the land after "doomsday."