Does your organic compost contain flame retardants, heavy metals and endocrine disruptors?  Well it might if you've been getting your compost from the City of San Francisco.  Activists poured sewage sludge on the steps of San Francisco's city hall last week in protest of the municipalities practice of marketing sewage sludge as "organic compost."  The word from our beloved EPA is that the sludge is safe, but many activists and scientists disagree.  The USDA seems to somewhat agree, at least with…

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