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Most of us have never heard of “biosolids”—but it’s time we do. Also known as sewage sludge, this is the concentrated waste from treatment plants that contains not just human waste, but pharmaceuticals, microplastics, PFAS “forever chemicals,” and industrial byproducts. And in many states, it’s being spread on farmland as fertilizer.
In this short episode, Wes Gillingham explains:
This isn’t a pretty topic, but it’s a vital one. What we flush doesn’t just disappear—it can end up right back on our plates.
By Dana DiPrima5
6666 ratings
Most of us have never heard of “biosolids”—but it’s time we do. Also known as sewage sludge, this is the concentrated waste from treatment plants that contains not just human waste, but pharmaceuticals, microplastics, PFAS “forever chemicals,” and industrial byproducts. And in many states, it’s being spread on farmland as fertilizer.
In this short episode, Wes Gillingham explains:
This isn’t a pretty topic, but it’s a vital one. What we flush doesn’t just disappear—it can end up right back on our plates.

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