One of the most heavily used insecticides to control pests in the United States until most uses were banned in 1982. It can still remain in water supplies due to runoff and leaching from this insecticide mostly used on cotton and cattle. Limited evidence in humans suggests that exposure for longer periods to lower levels may result in damage to the liver, kidneys, lungs, thyroid and nervous system. It has also been linked to an increased risk of cancer and can have effects on pregnant mothers and their babies.

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