NTP的报告将饮用水中过高的氟化物水平与儿童较低的智商联系起来。 The NTP report links excessive fluoride levels in drinking water to lower IQ in children.
美国国家毒理学计划（NTP）发布了一份报告，将饮用水中氟化物含量的两倍与降低儿童智商联系起来。 The U.S. National Toxicology Program (NTP) has released a report linking fluoride levels twice the recommended limit in drinking water to lower IQ in children. 该报告包括在加拿大、中国、印度、伊朗、墨西哥和巴基斯坦进行的研究数据,发现每升含1.5毫克以上氟化物的水与低智商有关。 The report, which includes data from studies conducted in Canada, China, India, Iran, Mexico, and Pakistan, found that water containing more than 1.5 milligrams of fluoride per liter was associated with lower IQs. 自2015年以来,联邦卫生官员每升水的限值高于建议的0.7毫克,而世界卫生组织(世卫组织)将安全氟化物限值定为每升1.5毫克。 The limit is above the recommended 0.7 milligrams per liter of water by federal health officials since 2015, while the World Health Organization (WHO) sets a safe fluoride limit at 1.5 milligrams per liter. 疾控中心指出,氟化物可加强牙齿和减少洞穴风险,但批评者反对将低水平的氟化物添加到水中。 The CDC states that fluoride strengthens teeth and reduces cavity risk, but critics argue against adding low levels of fluoride to water.