Now, remote rivers in the Alaska backcountry are turning from a pristine glacier blue to an alarming rusty bright orange, according to, a spectacular swath of mostly uninhabited mountains in the north of Alaska's arctic region.
"We’re used to seeing this in parts of California, parts of Appalachia where we have mining history," University of California Davis professor of environmental toxicology and study coauthor Brett Poulin. "But it’s very startling to see it when you’re on some of the most remote wilderness and you’re far from a mine source."Setting aside their unsettling color, the impact on the local environment is enormous, according to the researchers.
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