| http://www.w3.org/ns/prov#value | - Quite aside from the human waste issue, organic accreditation boards have decried sewage as contaminated with heavy metals such as cadmium and lead, which are readily absorbed by many crops. 4) All organic livestock should receive feed which was grown and processed without use of genetic engineering, irradiation, and municipal sewage sludge. (This is particularly important to dairy consumers.) 5)
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