Mercury is a highly toxic metal that most people on this continent no longer even want in their dental fillings let alone on fingers or in their lungs. But that is often where it ends up in small-scale mining communities. The ancient method—used as a fast and cheap way to extract gold—was extensively used in the Canadian gold rushes.
http://ring.uvic.ca/news/gold%E2%80%94good-development-toxic-children
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