New York State Chemistry RegentsNew York State Earth Science Regents

Living Environment Regents June 2004 Question 57 PDF Print E-mail
Human Impact on the Environment


Correct Answer: Chlorinated hydrocarbons are synthetic compounds produced industrially. These include pesticides such as DDT and PCBs (polychlorinated biphenols). Studies have shown that these chemicals damage the endocrine systems of a large number of animals, including humans.    These toxins are dangerous because as they become more concentrated as they go beyond the different trophic levels. Because of this, DDT has been banned in the United States (since 1970s).


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