Chemical Hazards in Developing Countries. Working Group. Città del Vaticano VAT, 1993/10/21.
Persistent polluting chemicals are, by definition, substances which have long half-lives or disappearance rates in the environment, mainly due to their chemical stability, but often also caused by unfavourable conditions for environmental/biological mineralisation processes to take place.
DDT, lindane, dieldrin, HCB, and PCB are well known examples of chemicals which can be found in various parts/compartments of the environment, and in living organisms including man.
The early findings in 1950s and 1960s of the persistent chlorinated pesticides in birds and fish populations in North America and Europe were obviously the results of deliberate and extensive use of these chemicals in agriculture and industry.
The findings were confirmed and substantiated by national and international monitoring programmes, and it became clear that many field observations of threatened species convincingly could be correlated to the increasing levels of contamination.
Still more man-made chemicals have been drawn into the field of interests as widespread pollutants, and the geographical areas in which contamination takes place have become ever larger.
The threat to groundwater ressources from infiltration of pesticides into soils, and the alarming reports on contamination of mothers milk are to-day well-known examples.
They are described from many parts of the world. (...)
Mots-clés Pascal : Chaîne alimentaire, Pollution chimique, Homme, Devenir polluant, Stabilité chimique, Accumulation biologique, Insecticide, DDT, Organochloré
Mots-clés Pascal anglais : Trophic chain, Chemical pollution, Human, Pollutant behavior, Chemical stability, Biological accumulation, Insecticide, DDT, Organochlorine compounds
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0505154
Code Inist : 002A14D05A. Création : 10/04/1997.