Contamination can reportedly enter the cabin via a system used to heat up and pressurize outside air through the engines

Rising incidents of toxic fumes seeping into airplane cabins have caused sickness and long-term harm to pilots, flight attendants and passengers, according to a Wall Street Journal investigation of decades of industry data.

The probe drew on more than one million Federal Aviation Administration (FAA) and NASA reports, thousands of documents, and over 100 interviews, the WSJ wrote on Saturday. The investigation found that airplane manufacturers and airlines had downplayed health hazards, lobbied against safety measures, and…

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