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Research shows humans, not geology, source of high arsenic levels in Yellowknife – CBC

May 21, 2021

Researchers used a tool to scientifically differentiate ‘natural’ arsenic from mine output

New research debunks a lingering belief that “natural arsenic” significantly contributes to high levels of the toxic substance around Yellowknife.

For many years, elevated levels have been attributed to natural bedrock geology, but geology experts from Queen’s University say it’s not so.

“The high values are due to pollution from human impact … Most of the emissions are from the roasters at Giant and Con [mines],” said Dr. Heather Jamieson, a professor and geology expert from Queen’s.

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