The chemtrail conspiracy theory began to circulate in 1996 when the United States Air Force (USAF) was accused of "spraying the US population with mysterious substances" from aircraft "generating unusual contrail patterns".
The chemtrail conspiracy theory holds that some contrails are actually chemicals or biological agents deliberately sprayed at high altitudes for a purpose undisclosed to the general public.Versions of the chemtrail conspiracy theory circulating on the internet and radio talk shows theorize that the activity is directed by government officials.As a result, federal agencies have received thousands of complaints from people who have demanded an explanation. The existence of chemtrails has been repeatedly denied by government agencies and scientists around the world.
According to a United States Air Force contrail fact sheet, contrails, or condensation trails, are "streaks of condensed water vapor created in the air by an airplane or rocket at high altitudes." These condensation trails are the result of normal emissions of water vapor from piston engines and jet engines at high altitudes in which the water vapor condenses into a visible cloud. Contrails are formed when hot humid air from the engines mix with, and are cooled by, the colder surrounding air. (The mixing is a result of turbulence generated by the jet engine exhaust). The rate at which contrails dissipate is entirely dependent upon weather conditions and altitude. If the atmosphere is near saturation, the contrail may exist for some time. Conversely, if the atmosphere is dry, the contrail will dissipate quickly.
TEXT http://en.wikipedia.org/wiki/Chemtrail_conspiracy_theory
TEXT http://contrailscience.com/chemtrail-myths/
TEXT http://urbanlegends.about.com/b/2008/07/01/of-chemtrails-and-conspiracy-theories.htm
TEXT http://www.nmsr.org/chemtrls.htm
TEXT http://www.seawana.com/conspiracy.php?consp=chemtrails
TEXT http://www.discoverychannel.ca/Article.aspx?aid=13516
TEXT http://goodsky.homestead.com/files/linesinsky.html
VIDEO http://www.youtube.com/watch?v=ZAY0MKMk6Gw&feature=related
VIDEO http://www.youtube.com/watch?v=oHqG6YV09fY&feature=related



