... All of these fish contain dangerous levels of an extremely destructive form of mercury called methyl mercury. This heavy metal attacks the nervous system of a ...
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... and using heavy machinery to expose potential gold-yielding gravel deposits. "Mercury contamination and increased river sedimentation can be a problem downstr ...
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... MMR vaccination in school. We have read so much about the suspected effects of mercury that we decided to be cautious. If you do not already know this, mercury ...
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