Levels of lead have dropped dramatically, exposure to second-hand smoke is down and most women are not burdened by unsafe levels of mercury, according to the latest U.S. government survey on chemical exposures. (Reuters)
Levels of lead have dropped dramatically, exposure to second-hand smoke is down and most women are not burdened by unsafe levels of mercury, according to the latest U.S. government survey on chemical exposures. (Reuters)
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