Originally Posted by
trek87
Commercial jets fly mainly well below the ozone layer, which is contained within Earth's stratosphere between about 15-30 km. It is this layer (and those above it) which is primarily responsible for absorbing otherwise harmful radiation from reaching altitudes lower than this.
Did some digging and found the article that I remember seeing before:
http://www.sciencedaily.com/releases...1210205048.htm
This is only about a year old...I would have figured ALPA would be interested in this and seeing if there is further proof that there is an occupational hazard...