Submitted by vvdmoneymuttornot t3_115d67p in askscience
redd-zeppelin t1_j94u582 wrote
Reply to comment by ramriot in Was reading something related to Rock Salt mining. In places like the Himalayas where rock salt mining is done in cold temperatures, a lot of miners report burns. Why is it so that salt burns in a colder surroundings? Would it be the same reason why the salt ice challenge was so dangerous? by vvdmoneymuttornot
https://en.m.wikipedia.org/wiki/Tibet%E2%80%93Nepal_salt_trade_route
"Throughout history, Nepalis and Tibetans have traded with each other via a number of mountain passes.[1] Two of the most important goods traded were salt from the lakes of Tibet (e.g. Namtso), and rice from the Middle Hills of Nepal.[2][3] For centuries, the barter of grain and other agricultural products from Nepal with salt and wool from Tibet formed the basis of a trade that has traditionally been in the hands of various, mostly Tibetan-speaking communities.[4]"
Salt mining has been a part of the traditional Tibetan economy for centuries, which I believe is what OP is talking about. I do know there is also a large industry in Pakistan now.
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