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CNN News: 水中致癌物新物质

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2016年09月26日

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Could an element commonly found in Americans` tap water caused cancer? A nonprofit environmental group is sounding the alarm about something called chromium-6. The U.S. government says high levels of it in the air can be carcinogenic, meaning they can cause cancer. But it`s not known yet if or how much chromium-6 in drinking water could be harmful.

一种常见于美国自来水中的元素引发癌症吗?一个非营利环保组织对此元素chromium-6敲响了警钟。美国政府表示空气中高浓度的此元素可导致癌症。但是,尚不清楚,在引用水中,chromium-6的致害浓度。

Still, the Environmental Working Group, an organization that says it`s dedicated to protecting human health, found chromium-6 in almost 90 percent of the water systems at sample across the U.S. It`s bringing additional scrutiny to the U.S. water supply following the recent discovery of high levels of lead in the water of Flint, Michigan.

环境工作组织,旨在保护人类健康。此组织发现,在美国收集的饮用水样本中,90%存在chromium-6。由于近期美国密歇根州弗林特市饮用水中铅含量超标,因此加美国供水系统加大了审查力度。

SUBTITLE: What is chromium-6?

chromium-6是什么?

Chromium-6 is a heavy metal and a carcinogen. It`s rarely found in nature. Instead, it`s created by various industrial processes.

chromium-6是一种重金属,同时也是一种致癌物质。自然界中很少存在,而主要于各种工业过程中产生。

SUBTITLE: It`s created by various industrial processes such as welding. And also used in many manufacturing processes, like tanning leather and producing stainless steel.

字幕:它产生于焊接等各种工业过程。也用于许多生产过程,如鞣制皮革和生产不锈钢。

There are reports that chromium-6 is in the drinking water of hundreds of millions of Americans. However, health authorities don`t know exactly what level of chromium-6 might pose heath problems. They do know that when they put chromium in the drinking water of rats and mice, that that level of chromium caused cancer.

据报道,数百万美国公民的饮用水中,都存在chromium-6。但是官方尚不清楚,chromium-6对人类构成健康威胁的含量水平。也不知道何时在老鼠的饮用水中,添加了导致其癌症的chromium-6的含量。

Scientists who study chromium-6 say they`re concerned about even very low levels of exposure to chromium-6 when it`s a child or an infant or developing fetus.

研究chromium-6的科学家担心,即使chromium-6含量很低,也会影响儿童、婴儿或胎儿的健康发育。

Could an element commonly found in Americans` tap water caused cancer? A nonprofit environmental group is sounding the alarm about something called chromium-6. The U.S. government says high levels of it in the air can be carcinogenic, meaning they can cause cancer. But it`s not known yet if or how much chromium-6 in drinking water could be harmful.

Still, the Environmental Working Group, an organization that says it`s dedicated to protecting human health, found chromium-6 in almost 90 percent of the water systems at sample across the U.S. It`s bringing additional scrutiny to the U.S. water supply following the recent discovery of high levels of lead in the water of Flint, Michigan.

SUBTITLE: What is chromium-6?

Chromium-6 is a heavy metal and a carcinogen. It`s rarely found in nature. Instead, it`s created by various industrial processes.

SUBTITLE: It`s created by various industrial processes such as welding. And also used in many manufacturing processes, like tanning leather and producing stainless steel.

There are reports that chromium-6 is in the drinking water of hundreds of millions of Americans. However, health authorities don`t know exactly what level of chromium-6 might pose heath problems. They do know that when they put chromium in the drinking water of rats and mice, that that level of chromium caused cancer.

Scientists who study chromium-6 say they`re concerned about even very low levels of exposure to chromium-6 when it`s a child or an infant or developing fetus.

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