此外,随着时间流逝,大多数塑料都会通过化学或物理过程发生降解,当大块塑料分解成5毫米以下的碎片时,就产生了“二级”微塑料。这项茶袋研究就与这种分解过程有关。麦吉尔大学的研究团队指出,接近沸腾的水可能会使茶袋在茶水里释放更多微塑料。2019年统计网站Statista的数据显示,欧洲人平均每年摄入0.8千克的茶叶,每年的市场价值达2230万美元(约合人民币1.6亿元)。
Although microplastics are recognized as an environmental problem - their size means they easily wash into the hydrological system and food chain - and they have previously been detected in tap water, bottled water and some foods, not much is known about the possible health effects to humans of ingesting microplastics. The World Health Organization has suggested particles in drinking water do not seem to pose a risk, but that their findings are based on "limited information" and that far more research is required.
尽管微塑料被视为一种环境问题——微小的体积意味着它们很容易就会被冲洗到水文系统和食物链中——过去也曾在自来水、瓶装水和一些食物中检测到微塑料——但是科学家对于人类摄入微塑料对健康带来的影响知之甚少。世界卫生组织指出,饮用水中的微塑料似乎不会对人体造成危害,但是他们的发现基于“有限的信息”,还需要进一步的研究。
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