Most manure used on farms are, how do you say, home grown and not trucked in from municipal locals. I guess I should add this caveat, Well at least not on most family owned farms. Who knows about the big corporate mega farms.
I guess Google AI is a source....
Microplastics can contaminate produce through various pathways, primarily involving environmental contamination during growth and processing. Sources include sewage sludge used as fertilizer, absorption by plant roots from contaminated soil and water, and plastic materials used in agricultural practices (like irrigation pipes and packaging). Additionally, food processing and packaging can also introduce microplastics
Most fertilizers here aren't packaged in plastic (anhydrous ammonia is a favorite), but then, we are growing mostly cereal grains and not produce. Cereal grains tend to be grown in pretty large farms (measured by the 'section' (square mile), not in acres, and handled in bulk when harvested using mostly metal containers, grain bins, augers, and even rail cars.
But produce growing areas, traditionally, have been close to large population centers, which have this problem.
They need to get rid of sewage sludge...
