造成下列现象与什么物质相关: 赤潮          ,水俣病??    

造成下列现象与什么物质相关:

赤潮          ,水俣病??     地方性甲状腺肿大     贫血        

答案

N、P或氮、磷,水源受到重金属污染如汞等、碘、铁。

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