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Chlorpyrifos is a widely used organophosphate insecticide that has been used in the U.S. since 1965 in both agricultural and non-agricultural areas.
Milk is an important source of calcium and other nutrients lacking in the diets of many children. It is also the only beverage, other than water, recommended in U.S. Dietary Guidelines. Milk consumption, however, has been decreasing in the U.S. and recent research suggests that increased concern about industry use of production-enhancing hormones and other chemicals, including pesticides and antibiotics, may be contributing to this trend. The use of these chemicals to produce foods commonly consumed by children is of particular concern.
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While there are approximately 900 synthetic pesticides approved for use in conventional farming, the National Organic Program only allows about 25 synthetic materials that pose little risk to human health or the environment in organic production. Organic farmers are also allowed to use most naturally derived substances. However, just because a substance originates in nature does not necessarily mean that it is safe. Thus, natural substances reviewed by the NOSB and found sufficiently harmful to humans and the environment also are prohibited from use in organic farming.