Human emissions of mercury from coal-fired power plants, waste-incineration, industry and mining make up the difference.
"Methylmercury is a potent neurotoxicant that bioaccumulates in fish and other organisms -- including us," said Sunderland, senior author of the paper. "Understanding the natural mercury cycle driven by volcanic emissions sets a baseline goal for policies aimed at reducing mercury emissions and allows us to understand the full impact of human activities on the environment."
read more... https://www.sciencedaily.com/releases/2023/11/231101134741.htm
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