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Nature's 'Brita Filter' Is Dying And Nobody Knows Why

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Nature's 'Brita Filter' Is Dying And Nobody Knows Why

NPR - Nathan Rott

On "good" bad days, the shells lie open at the bottom of the river, shimmering in the refracted sunlight. Their insides, pearl white and picked clean of flesh, flicker against the dark riverbed like a beacon, alerting the world above to a problem below. "That's what we look for in die-offs," says …

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