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Peer reviewedTessmer, Michael – Journal of College Science Teaching, 2005
Polychlorinated biphenyls (PCBs) are compounds that were once used as insulators in electrical transmission lines and in the production of polymers. Each PCB differs by the quantity and location of the chlorine atoms. PCB production was halted in 1977 due to their potential toxicity, but the chemicals are still found in the environment due to…
Descriptors: Case Studies, Science Experiments, Hypothesis Testing, Hazardous Materials
