科学家们研究证实,城市地区儿童的智力商数下降,成年人患高血压病的机率增加,以及新生婴儿致残,其罪魁祸首是汽车使用的加铅汽油(即含有四乙基铅防爆剂的动力油)造成的大气污染。众所周知,血液中铅的含量很高,对人体的影响是致命的。但是新近发现,血液中铅的含量即使低于两年前认为相当安全的水平,即每分升30微克,仍然具有危害性。空气中铅的污染主要来自汽车排放的废气。铅会损坏人的中枢神经系统,干扰大脑神经信号的传递。一至三岁的儿童最容易遭受永久性铅中毒。匹兹堡大学精神病博士赫伯特·尼德尔曼在几年以前首次提出 Scientists have confirmed that the IQ quotient of children in urban areas is declining, the incidence of hypertension in adults is increased, and the disability of newborn babies is caused by the use of leaded petrol (ie, Power oil) caused by air pollution. As we all know, the high content of lead in the blood, the impact on the human body is fatal. However, it has recently been found that the level of lead in the blood is still hazardous, even at levels below 30 micrograms per minute, considered to be reasonably safe levels two years ago. The lead pollution in the air comes mainly from emissions from vehicles. Lead can damage the central nervous system and interfere with the delivery of brain signals. Children aged one to three are the most vulnerable to permanent lead poisoning. Herbert Niederman, a psychiatrist at the University of Pittsburgh, first proposed a few years ago