Apparently US Magnesium is a major producer and they use evaporation ponds and brine from the Great Salt Lake. It's a bit of an environmental controversy becau

Apparently US Magnesium is a major producer and they use evaporation ponds and brine from the Great Salt Lake. It's a bit of an environmental controversy because they use a lot of water and the Great Salt Lake is shrinking. https://usmagnesium.com/ https://usmagnesium.com/