===External articles===
* Marty Coyne, "Solid Waste: EPA 'Closes Book' by Not Regulating Dioxins in Sludge," ''Greenwire'', October 20, 2003.
* Michael Kilian, "EPA won't regulate dioxin-tainted sludge; Critics argue that risk of disease too high to ease rules," ''Chicago Tribune'', October 18, 2003.
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[[category: Sludge Contaminants]]