The application of sewage sludge (renamed "biosolids" by industry PR) to fields has created worries about smell, disease, and toxic contaminants. Federal efforts to track sludge problems have been fragmented, haphazard, and delayed -- which does not inspire confidence in industry-backed federal assurances that sludge is safe. The assurances have preceded the evidence that would support them.
Sludge Tracking Efforts a Jumble of Research With No Clear Answers
Source: Greenwire, 08/27/2010