The Shadow of Gold criss-crosses the planet to shed light on the shiny substance

But a thirtyfold increase in the price of gold since the early 1970s has set off a hunt for more of it. We see residents near Yellowstone National Park trying to stop mining in their area; visit the Mount Polley mine in British Columbia, site of a 2014 environmental disaster; and learn that “artisanal gold,” which sounds respectably quaint, in fact refers to small-scale mines that use dangerous mercury to extract the gold.
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