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Case Study: Silent Spring

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Submitted By NEdge001
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* Provide a brief explanation of the cause and effects associated with this case.
Rachel Carson had a history of interest with the chemical called DDT. She had tried to get DDT some attention unsuccessfully until her book came out in 1962. She had a friend who wrote her about the large bird kills on Cape Cod from the use of DDT. DDT around the late 40’s and 50’s was thought of a miracle pesticide and its use became very popular. Carson tried over a long period to get a magazine to support her in showing the negative side of DDT usage. But after a long time she had a lot of her own research and decided to go on with her own book. Her book “Silent Spring” showed how ddt entered the food chain and then we stored in the fatty tissues of animals and even humans which was the cause of cancer and genetic damages. Carson discovered that a single application of DDT to a crop would kill insects for months, and it would kill more than just the target insects. Even after being diluted by rain it would still remain toxic to the environment for a long period of time. Carsons book concluded that DDT, along with other pesticides had irrevocably harmed birds and other animals which had contaminated the worlds food supply. * Provide a brief explanation of biomonitoring and the steps involved in risk assessment. Relate these to the case study.
Biomonitoring is a method for determining which chemicals get into members of the populations and what those concentrations are. It can be used to monitor if some groups have a higher or lower exposure than other groups. It can be used to track temporal trends in the levels of exposure. Biomonitoring is used to establish reference ranges. The risk assessment is done on a chemical by chemical basis based on the chemicals exposure and response assessments. The risk assessment sometimes is focused on observable effects. A risk assessment

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