Question 43 Why is it that Biomagnification can cause a contaminant in lipid tis
ID: 1710531 • Letter: Q
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Question 43
Why is it that Biomagnification can cause a contaminant in lipid tissue of a fish to become much greater than one would calculate using the ambient water concentration and the K_ow? Why does biomagnification cause contaminant levels to generally increase in fish the older the fish? If you eat only "organic" food, will you really avoid dioxins and PCBs in your diet? Why/why not? In organophosphate pesticides, what kind of linkage is present? Name it and draw it using R groups to denote some kind of organic chain. Aldicarb is a carbamate. What's the linkage present, and is it an insecticide or herbicide? Permethrin is a synthetic pesticide that is based on what kind of natural structure, and is it an insecticide or herbicide? Why isn't the pesticide 2, 4, 5-T manufactured any more? And is it an insecticide or herbicide?Explanation / Answer
43.
Organic food is free from pesticides and fertilizers and it is grown naturally unlike conventional means by using pesticides and fertilizers. There is no way to control the dioxins and PCBs that settle on crops and fields - whether organic or conventional - as the result of industrial or residential burning. However, organic production practices do reduce dioxin exposure through reduced use of synthetic herbicides and pesticides. There are no studies comparing the dioxin levels of organic and non-organic animal products, but it is reasonable to assume that, because organic livestock would not be consuming as many dioxins through their feed, their milk and meat products would similarly show lower dioxin levels.Each year over 1.2 billion pounds of synthetic chemicals are disposed of or applied to our land or disposed directly into our waters. Nothing on earth is free from this "toxic burden." In fact, this is why the organic industry was birthed: to restore our soil to health and to bring awareness to the public of this pollution. The organic promise is to do everything possible to reduce the amount of harmful chemicals in our food, our bodies, and the earth. Organic food and farms cannot promise 100% pure food, but in test after test of organic foods versus conventional foods, organic consistently shows significantly less residue than conventional.
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