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The term “persistent organic pollutants” (POPs) was fixed for 16 contaminating substances and groups in the POPs Protocol to the Convention on Long-range Transboundary Air Pollution. The signing of this protocol was held in Aarhus (Denmark), June 24, 1998. The concept of POPs represents group of compounds of different nature that have a number of common features at the same time, especially in terms of environmental risk. The organic compound with the following features is of the greatest concern: persistence in the environment; resistance to degradation; acute and chronic toxicity; bioaccumulation; transboundary long range transport by air, water, or with migratory species.

Newman and Unger fairly believe that when speaking about ecotoxicology one should consider key emerging contaminants in detail, work with the results of research concerning their cycle in the nature, and discuss bioaccumulation. The significant role of contaminants in ecological organization raising levels and also risk assessment and regulatory questions should be considered as well.

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Persistent organic pollutants (POPs) are an accumulation of compounds of organo-chloride and agnate chemicals that are decumbent to alternation and bioaccumulation in the aliment chain.

As a result, the animal anatomy, including human body, can ascertain trace amounts of these chemicals. Their presence is usually due to the burning of such foods as fish, meat, eggs and dairy products. Environmental studies announce that POPs are present in the diet of some agrarian animals’ breed. They have abrogating impact on their body, including cancer, adorning disorders and ashen disorders in the changeable sphere. Some of these substances are of accurate affair because they can actor the activity of hormones and affect the anatomy at acutely low concentrations.

Most of the complaints are bidding to the twelve POPs, the alleged “Dirty dozen”. Nine of them accord to the acclimated pesticides, which accommodate aldrin, DDT, chlordane, dieldrin, endrin, heptachlor, hexachlorobenzene, mirex and toxaphene. Their assembly and use in the countries is prohibited or strictly regulated. In accession to the above, there are three abhorrent causes of POPs produced on an automated calibration by actinic substances. They accommodate the broadly acclimated polychlorinated biphenyls (PCBs), able-bodied as two groups of automated by-products: polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDF). Although the assembly of PCBs is abundantly banned for a number of years, electrical transformers and added articles of these chemicals are still acclimated and are an austere botheration in the agreement of recycling. As for the PCDDs and PCDFs, there are bigger methods of ascendancy assembly and abridgement of emissions from combustion. The same is the ability bearing and decay incineration, accustomed to accomplish abundant aftereffect on reduction of the levels of such chemical elements in breast milk.

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