Debate swirls on compost made from human waste

05/17/2013 | National Public Radio

Human waste was one of the earliest forms of fertilizer until urbanization spurred the development of sewage systems that piped the stuff out of town. Today, it's approved for use on conventional crops but not organic, and debate continues on the safety of using treated sewage as compost, with supporters citing its safety and effectiveness and opponents arguing about the possibility of contaminants including drugs and heavy metals remaining after treatment.

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