Nicholas S. Fisher got a research opportunity he couldn’t pass up.
When he embarked on a study of fish two years ago, he didn’t know what he was looking for. All he knew was that a researcher in Massachusetts had samples of nearly 1,300 Western Atlantic bluefin tuna in a deep freeze and was offering them up for investigation.
Today, his team’s findings are being greeted as some of the most positive news in a while related to the lowering of power-plant emissions. Studies of tuna caught in the Gulf of Maine between 2004 and 2012 revealed that levels of methylmercury in their bodies decreased at a rate of 2 percent per year, or nearly 20 percent over a decade.
“The decline is real,” Fisher,
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