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Idaho poisoned the Snake River to kill an invasive mussel. Some call the results ‘heartbreaking’

The copper treatment intended to eliminate invasive quagga mussels in Idaho's Snake River caused the death of 48 out of 49 local white sturgeon and destroyed up to 90% of invertebrates, raising ecological concerns.

Summary by The Oregonian
In 2023, Idaho officials found invasive, microscopic mussels in a river. So they released 40,000 pounds of poison.

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The Oregonian broke the news in Portland, United States on Sunday, August 17, 2025.
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