More than eight million tons of sludge -- the muddied, dry substance left behind after sewage is treated -- is produced in the U.S. each year. No one knows exactly how harmful sludge may be, but some activists say it's toxic. We examine how sludge is treated and regulated.
http://thekojonnamdishow.org/shows/2007-04-30/where-do-our-waste-products-go
Where Do Our Waste Products Go?
Listen Monday, Apr. 30, 2007 at 1:25 p.m. in Environment, Health
CD or 
TRANSCRIPT of this program.
Guests
Robert Hale
Professor of Marine Science in the Department of Environmental and Aquatic Animal Health at the Virginia Institute of Marine Science, College of William and Mary.
Laura Orlando
Resource Institute for Low Entropy Systems (RILES)
Chris Peot
Manager of Biosolids, Blue Plains Advanced Waste Water Treatment Plant, DC Water and Sewer Authority
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