sep 11, 2019 - 9.11 A group of chemical engineers in Hong Kong found that chemical residues of tear gas were still present half a month later in some of the communities

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A group of chemical engineers in Hong Kong studied six communities where tear gas was used and found that chemical residues were still present half a month later in some of the communities, and they were worried that this would become a hidden health risk.


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http://34.74.129.246/politics/%E5%82%AC%E6%B7%9A%E5%BD%88%E6%96%BD%E6%94%BE%E5%BE%8C%E9%80%BE%E5%8D%8A%E6%9C%88%E4%BB%8D%E6%9C%89%E6%AE%98%E7%95%99-%E5%8C%96%E5%AD%B8%E5%B7%A5%E7%A8%8B%E5%B8%AB%E7%B1%B2%E5%A4%A7%E5%AD%B8%E4%BD%9C%E6%B7%B1%E5%85%A5%E7%A0%94%E7%A9%B6/

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https://thestandnews.com/politics/%E4%B8%80%E7%BE%A4%E9%A6%99%E6%B8%AF%E5%8C%96%E5%AD%B8%E5%B7%A5%E7%A8%8B%E5%B8%AB%E7%A0%94%E7%A9%B6-%E5%82%AC%E6%B7%9A%E7%85%99%E5%8C%96%E5%AD%B8%E7%89%A9%E5%9C%A8%E7%A4%BE%E5%8D%80%E6%AE%98%E7%95%99%E9%95%B7%E6%99%82%E9%96%93-%E9%9B%A3%E6%B8%85%E6%B4%97-%E4%BF%83%E8%AD%A6%E5%8B%BF%E9%81%8E%E4%BB%BD%E4%BD%BF%E7%94%A8%E5%82%AC%E6%B7%9A%E5%BD%88/

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