According to a recent MSNBC article, numbers of air travelers have complained of experiencing tremors, crippling headaches, and other neurological problems after breathing strong fumes in flight. Numerous studies now blame the personal injuries from the airplanes on a “bleed air system” which is used on almost all commercial jets. The plane’s engines suck in fresh air from outside and circulate it. But, if there are oil leaks in the engine, the system can actually pump toxic fumes through the cabin.
To read more about the safety of airplane air.