Species of Tuna

Species of Tuna

Want proof that reductions in coal burning are starting to make a difference? Look no further than the Atlantic bluefin tuna. A new study finds that the levels of mercury in these popular fish declined by about 19 percent between 2004 and 2012.

The toxic heavy metal is carried into the ocean by way of emissions from coal-burning power plants. Tuna sit at the top of the food chain, so their levels of mercury contamination build up to very high concentrations as they eat smaller fish over their long life spans. For decades, health officials have warned that tuna contained enough mercury that their consumption could cause health problems in humans, especially children and pregnant women.

Tuna still contains pretty high mercury levels, the study found, so those health risks have not vanished. They have, however, slightly lessened.

The study’s senior author, Nicholas Fisher of the State University of New York at Stony Brook, said tuna is the “largest pathway for mercury exposure […]

Read the Full Article