MICROPLASTICS ARE, quite literally, everywhere—in rivers and lakes, clouds and soil, the depths of the ocean, the heights of Mount Everest. They have shown up in meat, seafood, fruits and vegetables, salt, sugar, and seemingly every corporeal realm scientists have checked, including our lungs, saliva, feces, blood, testicles, and breast milk. Earlier this year, a study published in Nature Medicine suggested there may be up to 7 grams of microplastics in the average human brain—about the weight of a plastic spoon. And our exposure is likely to only get worse; plastic production, UN researchers estimated in 2021, is set to double by 2040.
The public isn’t too thrilled about that. About a third of Americans polled by PBS, NPR, and Marist University in 2024 said they’ve actively tried to cut…