Forbidden spicy air makes for valuable sunken metal.
this is an extremely interesting fact
Fun fact: due to above ground testing bans, and improvements to how steel is manufactured, low background steel is no longer needed for most radiation sensitive applications. Thats a good thing, because applications that need low background steel tend to REALLY need it. Atmospheric air is still used to make steel, so there tend to be radio isotopes in regular steel, even as the amount in the atmosphere continues to fall.
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