For decades, cities and states have been using treated human sewage, called "biosolids", to create composts and fertilizers. They've also applied millions of gallons of biosolids to farmland across the United States. But now, the EPA is taking a closer look at the myriad contaminants that end up in biosolids. Are they safe to put in our gardens and on our crops? Tests reveal the shocking truth.
Aired 12/14/2023