Well, I doubt that a commercial operation would actually use this method, but I know that the individual operations do in the Amazon. I was watching a show about how it was contaminating local drinking water and creating a lot of health hazards for villagers. I have absolutely no idea how they pull gold or silver out of veins with a commercial operation. I assume it would be done with water in some manner to separate it. But you can do that with a bigger operation. That just seems like a cheaper way of doing things and one that is safer, which would make it easier to get government approval I imagine.
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