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   漂亮的石头 版主 Staff Member

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   冲天炮、烟花和罗马蜡烛等是消费者庆祝活动时会用到的东西，然而这些均属于持久性有机污染物。不过你是否知道这些东西中含有贵重金属呢？近日YouTube频道Cody’s Lab购买了一百盒纸砂炮，并试图从这些纸砂炮中提取银。令他惊讶的是，最终提取的银比他预想的足足多了四倍。

    

   漂亮的石头, 2016-07-05

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