It has to do w/what’s in the animals doing the shitting. And with humans there’s a ton of pharmaceuticals and PFAS
. (Obviously the cows are eating a bunch of crap also.)
Lots of info online about bio sludge that can answer your question better than I. Since it was lawn fertilizer I’d prefer not to lay in the human shit while smoking doobies. (Plus it had arsenic, which while also organic, I like to avoid.)
Nearly 70 million acres of U.S. farmland could be contaminated by the toxic “forever chemicals” known as PFAS, according to estimates from biosolids industry groups. This contamination stems from the widespread use of sewage sludge as fertilizer.
www.ewg.org