Three years ago, the 120-plus member countries of the United Nations Environment Programme reached an agreement at a conference in Johannesburg, South Africa to completely ban or strictly limit the use of 12 "persistent organic pollutants" that disrupt hormonal activity. These super-poisons fall into three major categories: organochlorine pesticides (such as DDT and heptachlor); polychlorinated biphenyls (PCBs); and polychlorinated dibenzo-para-dioxins and dibenzofurans (dioxins and furans).
三年前，聯合國環境總署一百廿餘國代表在南非約翰尼斯堡達成協議，全面禁用或嚴格限用會造成荷爾蒙干擾的十二種持久性有機污染物，包括有機氯殺蟲劑（如 DDT、飛佈達）、多氯聯苯（PCB），與含氯氧化聯苯（如戴奧辛、咈喃）等三大類世紀之毒。