Titlebook: Environmental Dynamics of Pesticides; Rizwanul Haque,V. H. Freed Book 1975 Plenum Press, New York 1975 Contamination.biosphere.chemistry.e

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of these chemicals to increase. However, some of them have found their way into the biosphere and have been classi­ fied as persistent toxic chemicals. This has resulted in serious concern about environmental contamination. Since we are going to continue using chemicals, we should learn more about s

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Alltag mit Lust und Frust gestalten, established that appreciable quantities of even the so-called nonvolative pesticides, such as the organochlorine insecticides, move into the atmosphere by vaporization. Regardless of inherent volatility, the same physical and chemical principles govern rates of vaporization and movement of chemicals from treated surfaces.

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Herausforderungen und Konflikte des Alters,ol-borne DDT and DDE approximately three times higher in tradewinds sampled at Barbados in 1968. In a more recent study (Bidleman and Olney, 1974) average DDT levels of approximately 20 × 10. g/m., 100 times those of the earlier studies, were reported from air sampled at and near Bermuda.

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,Ärger — eine erste Annäherung,can reliance be placed solely on chemical control. The future role of pesticides will have to be more judicious and restrained, respecting the benefits of natural predators in the role of controlling harmful pests.

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