Get the lead out: Apart from the powerful toxins produced comparatively easily by factories, just what is the danger level for heavy metals in the human body? There is still no way to be sure.
淘汰鉛管、禁用鎘容器除工廠內較易發生的急性中毒，人們對某些重金屬在人體內的危險含量究竟多少，仍無法確定。