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The state also cracked down on mercury in dental implants and mercury that went up the smokestacks of crematoria and was among the first to require power plants to reduce mercury emissions. The federal Environmental Protection Agency has followed suit nationwide.
Many Northland residents were jolted a year ago when the Minnesota Department of Health released a study that showed 10 percent of all babies born in the Lake Superior region of the state have levels of toxic mercury in their bloodstrea