Check out Frederick Kaufman s meandering but sound Wasteland Harpers Magazine 2008 and Radiolab s naive rose coloured Pooptrain WNYC 2013 to kick off an investigation of the larger sewage bio solids for breakfast epidemiological back story 1990 to present And here s a smorgasbord appetizer of related sludge fertilizer material Sewage Sludge at Sourcewatch org Hazardous Waste in Fertilizer by Diane Olson Rutter 2003 3 part Sludge Series C Vahnyk Toronto Star 2008 Holding the Bag Toxic Waste in Fertilizer Washington Toxics Coalition Report 2001 Citizens for Sludge Free Land non profit anti bio solidsfertilizer advocacy site