I just figured in a WW3 nuclear scenario people who live in landlocked areas will have troubles obtaining enough Iodine for nutrition and anti radioactive purposes on the long term. If you research about food etc you'd realize every non Seafood food that contains Iodine does so because the animals have been fed with food that contains Iodine. Or salted with salt that has been enriched with iodine.
Now Iodine is important in terms of health, but also to prevent certain forms of thyroid cancer caused by radiation.
I did some minor research and so far I figured Iodine is found in rocks and gets washed out. So my question is how do you obtain Iodine? how can you "mine" your own Iodine? Where do you find these rocks? I googled it and cant fine a proper result.