Salt

[Raellus]

@SSC: Thanks for the links. I was pretty sure that this topic had come up before. I tend to like gathering discussions of a particular topic in one central location, to focus the discussion and for ease of reference.

Originally Posted by Vespers War

Urine and pure (dog dung) for tanning (which also benefits from salt for curing the hides - there are other ways, but not as simple).

Feces would also resume much of its traditional importance as fertilizer for agriculture. In the third world, it still used quite often (oftentimes predominantly) but in the first world, it was completely replaced by chemical fertilizers many decades ago). In the T2kU, those chemical fertilizers would no longer be available, and dung, animal and human, would become the go-to fertilizer.