A large drop in bluefish mercury levels suggest a healthier seafood supply – and that U.S. coal regulations are working.

Mercury levels in bluefish caught off the U.S. Atlantic coast have officially dropped 43% since 1972, according to a new study in Environmental Science & Technology.

Scientists say the drop is due to federal restrictions on coal emissions that have resulted in less mercury being transported by rainfall into the ocean.

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Emissions from the top 100 U.S. electric power producers have decreased by 50 percent during 2000-2012, according to a Natural Resources Defense Council report.

The lower mercury levels are promising for bluefish and other predatory fish like tuna and swordfish, which have been considered a major source of mercury exposure in the U.S. and linked to health complications in pregnant women and their children.

(READ more at Environmental Health News) – Photo by NOAA

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