宇宙时空之旅（2014）

Cosmos: A SpaceTime Odyssey S01E07

Part 6 April 25, 2021, 12:40 p.m.

是一种非常不负责任的行为
of toxic material and disperse it into the environment!
要是铅对人体有害我们早就发现了
If there was proof of harm, we would have found it.
可你的目的是为了赚钱
Not if your purpose is to sell lead.
帕特森在之后的20年中一直在为此奔波
Patterson fought the industry for another 20 years
直到美国最终禁止铅作为消费品
before lead was finally banned in U.S. Consumer products.
那个发现地球真实年龄的男人
The man who figured out the age of the Earth
也同样为20世纪
was also responsible for one
最伟大的公众健康斗争的胜利做出了贡献
of the greatest public health victories of the 20th century.
仅仅几年儿童血液中的铅含量
In just a few years, average lead levels in the blood of children
就下降了75%
plummeted by some 75%.
如今医学界一致认为
Today, the medical consensus is unanimous...
人体内的铅含量即使很低
there's no such thing as a nontoxic level
也是对人体有毒的
of lead in humans, however small.
现如今科学家们拉响了
Today, scientists sound the alarm
其他环境问题的警报
on other environmental dangers.
既得利益团体还在雇佣他们的科学家
Vested interests still hire their own scientists
为此狡辩
to confuse the issue.
可是最终
But in the end,
大自然才不糊涂
nature will not be fooled.