Half of fish tested in an river have unsafe levels of mercury

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Low and declining mercury in Arctic Russian rivers

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Advocates concerned about high mercury levels in state's fish

Mercury, fish and gold miners - Encyclopedia of the Environment

Fish in 50% of U.S. Lakes Have High Levels of Mercury

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Mercury from gold mining contaminates communities' staple fish

Mercury from gold mining contaminates communities' staple fish

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Total mercury and fatty acids content in selected fish marketed in Quito – Ecuador. A benefit-risk assessment - ScienceDirect