What goes down your toilet can end up on farm fields across the United States. Biosolids, or sewage sludge, are the solid byproducts of the wastewater treatment process. So how does this nutrient-rich residue come about? (AP Video: Joshua A. Bickel)
Sewage sludge finds a second life as fertilizer
What goes down your toilet can end up on farm fields across the United States. Biosolids, or sewage sludge, are the solid byproducts of the wastewater treatment process. So how does this nutrient-rich residue come about? (AP Video: Joshua A. Bickel)