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Polychlorinated biphenyls (PCBs) were first synthesized in the late 1920s by the chemical company Aroclor, primarily for use as dielectric fluids in electrical equipment due to their non-flammability and chemical stability. They were widely produced and used in various industrial applications until their harmful environmental and health impacts became evident. In the 1970s, concerns over their toxicity and persistence in the environment led to a ban on their production and use in many countries.

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1mo ago

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