Salt — The only rock we eat

If you took the sodium chloride out of human history, you would have a very different and strangely flavourless tale to tell. Salt has historically been one of the world's most valuable commodities. Its discovery, extraction and commodification has shaped the story of humanity. So, let's take a trip from the test tube to the kitchen, to salt tolerant plants that could revolutionise agriculture.This is an episode of Blueprint for Living, originally broadcast on March 24, 2018.