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Tainted waters


, : Tainted waters. Environment 40(5

Scientists have recently found that pharmaceutical chemicals present in the environment come from human medications rather than hazardous waste spills or industrial accidents. The body may excrete as much as 90 percent of a drug in a biologically active form, and a range drugs has been detected in water at concentrations of up to four parts per billion. As a result of these findings, researchers are questioning whether such drugs pose health risks to humans and wildlife, threaten ecosystems, and perhaps contribute to the growth of antibiotic resistance.

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