Persistent organic pollutants (POPs) such as hexachlorocyclohexane (HCH), polychlorinated biphenyls (PCBs) and dichlorodiphenyltrichloroethane (DDT) are very universal in China.

• 各类有机氯污染物在我国的污染非常普遍,主要以六六六,滴滴涕,多氯联苯为主。