Some other interesting reading:. .. .The first is a publication from the National Academy Press in the US. It is "The Airliner Cabin Environment and the Health of Passengers and Crew" publication(2002) and contains much scientific analysis. It runs to over 300 pages, but is selectable.. .<a href="http://books.nap.edu/books/0309082897/html/R1.html" target="_blank">http://books.nap.edu/books/0309082897/html/R1.html</a>. .. ....comments from an academic about a US govt sponsored investigation into cabin air quality: . .<a href="http://www.mediarelations.ksu.edu/WEB/News/NewsReleases/airquality120601.html" target="_blank">http://www.mediarelations.ksu.edu/WEB/News/NewsReleases/airquality120601.html</a>. .. ....an article from an ex-hostess which is a little older: . .<a href="http://www.flyana.com/air.html" target="_blank">http://www.flyana.com/air.html</a>. .. ....and some links from a flight attendants site:. .<a href="http://www.flightattendants.org/cabinair.htm" target="_blank">http://www.flightattendants.org/cabinair.htm</a>