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The 12 Initial POPs

PERSISTANT ORGANIC POLLUTANT = hazardous organic chemical compound resistant to biodegradation thus remains in the environment a very long time.

The 12 initial POPs under the Stockholm Convention

Initially, twelve POPs have been recognized as causing adverse effects on humans and the ecosystem and these can be placed in 3 categories:

  • Pesticides: aldrin, chlordane, DDT, dieldrin, endrin, heptachlor, hexachlorobenzene, mirex, toxaphene;
  • Industrial chemicals: hexachlorobenzene, polychlorinated biphenyls (PCBs); and
  • By-products: hexachlorobenzene; polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/PCDF), and PCBs.


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