據外媒報道，研究人員說，由于海水受到污染，夏威夷黃鰭金槍魚體內汞含量升高，每年增加3.8%以上。
燒煤的電廠和人工開采金礦作業會產生汞。具有強烈毒性的汞會流入世界各地的水中，對吃某些魚類的民眾構成健康風險。科學家預計魚類體內汞含量將升高，這是空氣污染因工業化而加劇的結果，但很難找到證據。
部分原文報道如下：
mercury concentrations in Hawaiian yellowfin tuna are increasing at a rate of 3.8 percent or more per year, according to a new University of Michigan-led study that suggests rising atmospheric levels of the toxin are to blame.
Mercury is a potent toxin that can accumulate to high concentrations in fish, posing a health risk to people who eat large, predatory marine fish such as swordfish and tuna. In the open ocean, the principal source of mercury is atmospheric deposition from human activities, especially emissions from coal-fired power plants and artisanal gold mining.
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日期：2015-02-05
