In an early episode of The Simpsons, a character named Jimmy dreams of a world without zinc. Telephones, cars and handguns containing the metal all fail to operate in Jimmy’s zinc-free nightmare, a satirical take on consumers’ lack of knowledge about what goes into everyday items.
Jimmy’s vision could just as well be applied to salt. The mineral sprinkled on food without a second thought is also used in the manufacture of just about every household item, from ceramic cereal bowls to shirt buttons.