The UK has an extensive potash mine. Quite an amazing site - it extends out under the North Sea in places and has a laboratory doing various interesting science

The UK has an extensive potash mine. Quite an amazing site - it extends out under the North Sea in places and has a laboratory doing various interesting science: https://en.wikipedia.org/wiki/Boulby_Mine https://en.wikipedia.org/wiki/Boulby_Mine But what struck me about it was the seemingly pretty scary thought that we are apparently dependent on non-renewable sources like this to stay alive, and everyone continues life like it's a sensible way to proceed. What happens if/when supplies are interrupted? Or the mineral is mined out?