The Chinese government is analyzing urine and feces from sewage as part of a sweeping national crackdown on illegal drug use. China isn’t the first country to sift through sewage in order to collect data on illegal drug use, but as far as we know it’s the first to implement the technique in actual law enforcement situations — a move which prompts a litany of privacy and citizen safety concerns. According to a report from Nature, authorities used an analysis of sewage in the Chinese city of Zhongshan to locate and arrest a drug manufacturing operation. And there are already…

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