The British union called on airlines to pay attention to the problem of polluted air in airplanes, the RIA news portal writes. Outdated filters in air conditioning systems lead to intoxication of the body of crew members and passengers, as harmful vapors from Boeing engines penetrate into the cabin. The campaign kicked off after an incident in Boston. The British airline liner returned to the port of departure 1.5 hours after take-off due to crew sickness. Ten employees were hospitalized, three were prescribed serious treatment. In addition, a year ago, a 34-year-old man who was a member of the crew, died of aerotoxic syndrome.