“Lawmakers cited a Los Angeles Times investigation that found that dangerous vapors contaminate the air supply on planes with alarming frequency, sometimes sickening passengers and crew and incapacitating pilots during flights. Over a two-year period, nearly 400 pilots, flight attendants and passengers reported receiving medical attention after these “fume events,” and four dozen pilots were described as impaired to the point of being unable to perform their duties, The Times found.”

Congress tackles toxic fumes on airplanes with new bill – Los Angeles Times (latimes.com)