9/11 toxins: polychlorinated biphenyls
Polychlorinated biphenyls (PCBs) are synthetic chemicals used for their durability and electrical insulating properties. Despite being banned in the United States in 1979 due to their harmful health effects, PCBs were still typically found in older buildings constructed before the ban.
The Twin Towers were one of the establishments that contained PCBs in their construction materials. Its horrific destruction allowed PCBs to be released into the air and soil. This incident created a hazardous environment not only for residents but also for emergency responders.
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