| http://www.w3.org/ns/prov#value | - Pesticides and other man made chemicals (PCB's, etc.) have been around for so long that they are ever present in the food chain and cannot be removed - these chemicals are stored in the body fat of animals, and science has shown that they occur even in herbivorous animals at the lower end of the food chain, and at higher levels in animals, including man, at the higher stages of the food chain.
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