Well, the water in our bodies are polluted with all sorts of things: amino-acids, vitamins, salts, etc. Actually making tissues freeze require a temperature several degrees below the freezing point of pure fresh water.
Whatever not-water you put in the pure water will lover the melting point, and by about the same percentage. I called it 'pollution' brcause it do not much matter what you put in (as long as it dissolves in water), salts acids, bases, it is all the same. We use salt on winter roads because it is cheap and not too damaging to people who accidentally swallow a bit of it. Sulfuric acid is more expensive, and downright dangerous to spread around the way we spread salt.
This post was edited by JakobA the unAmerican. at September 14, 2017 4:55 PM MDT
JakobA the unAmerican. 