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The chemtrail theory is a group of theories regarding what are claimed to be unnatural contrails from aircraft. Contrails are formed by condensation of water vapor in the aircraft's exhausts. Proponents of the theories maintain that some trails have an appearance and quality different from those of normal water-based contrails; i.e. that chemtrails are not consistent with the known properties of contrails. The general unifying factor is the belief that some kind of chemical or biological agent is being secretly released. The term "chemtrail" should not be confused with other forms of aerial dumping (e.g. crop dusting, cloud seeding or aerial firefighting). It specifically refers to systematic, high-altitude dumping of unknown substances for some undisclosed purpose..
Among the theories proposed for the purpose of the alleged "chemtrails" are: atmospheric and weather modification, biological warfare, mind control or occult purposes. They are also theorized to be part of a system to counter the effects of global warming, to create a cheap wireless communications network for the military, or to create a more sophisticated radar system (for both defensive and scientific application).
The chemtrail theory apparently first achieved prominence in mid-to-late 1990s.  Chemtrails have been discussed on radio programs hosted by Art Bell and Jeff Rense. According to a FAQ posted at Jeff Rense's website, "chemtrails (CTs) look like contrails initially, but are much thicker, extend across the sky and are often laid down in varying patterns of Xs, tick-tack-toe grids, cross-hatched and parallel lines. Instead of quickly dissipating, chemtrails expand and drip feathers and mares' tails. In 30 minutes or less, they open into wispy formations which join together, forming a thin white veil or a 'fake cirrus-type cloud' that persists for hours."
Lacking proper scientific equipment, most chemtrail theorists can only speculate about the composition of the alleged chemtrail. However, one chemtrail theorist, Clifford E. Carnicom, operator of a website entitled "Aerosol Crimes and Cover-ups", claims to have analyzed ground-level air samples following chemtrail events. It is not clear what his experience or expertise in chemical analysis is, but he carefully detailed the methods and procedures he used. He claims to have found airborne aluminum, barium, calcium, magnesium and titanium, and "microscopic fibers" in areas supposedly exposed to chemtrails.
Dr. Leonard Horowitz, a graduate of Tufts University and former faculty member at Tufts and Harvard University, discusses chemtrails in his 2001 book Death in the Air: Globalism, Terrorism & Toxic Warfare.
"Chemtrails" are mentioned in House Bill HR 2977, the Space Preservation Act of 2001, introduced by Congressman Dennis Kucinich, where it appears as one of a list of "exotic weapons system[s]" to be banned under the bill. Proponents of the reality of chemtrails point to this as official acknowledgment of the possibility, at least, of such weapons systems. The reference to Chemtrails was omitted from the version of the bill re-introduced by Kucinich in 2002 as HR 3616  or in 2003 as HR 3657.
An article entitled "The Chemtrail Smoking Gun" by Bruce Conway, suggested that chemtrails represent the implementation of technologies suggested in a 1992 National Academy of Science study, Policy Implications of Greenhouse Warming; specifically, that chemtrails are part of a secret project intended to mitigate global warming. Some science has corroborated this phenomenon as global dimming.
The Las Vegas Tribune, a free weekly broadsheet, ran an article on September 9, 2005, entitled "Chemtrails - Coming Out Of The Closet?", wherein that publication's managing editor, Marcus K. Dalton, stated that United States Air Force scientists working at Wright-Patterson Air Force base in Dayton, told Columbus Alive - a weekly entertainment magazine - that they had been conducting two aerial spraying experiements: "one involved aluminum oxide spraying related to global warming and the other involved barium stearate and had to do with high-tech military communications." Dalton basically rehashes William Thomas's article in Convergence Weekly, though some new information is presented.
 Skeptical response
Skeptical groups, including the government supported Committee for the Scientific Investigation of Claims of the Paranormal, assert that contrails normally exhibit a wide variation in appearance and that the descriptions and photographs of "chemtrails" are perfectly consistent with those of ordinary contrails (, ). They also voice various objections to the idea of chemtrails:
- Depending on what the alleged purpose of the chemtrail spraying would be, spray released above 30,000 feet is likely to be highly unpredictably dispersed due to high-altitude winds. ().
- How do aircraft accused of depositing "chemtrails" manage to pass inspection without the deception being discovered?
- Official and governmental bodies have consistently denied the existence of such spraying — although if such a conspiracy existed, such denials would be expected.
 Similar phenomena
Airplanes occasionally jettison fuel during flight, and sometimes even jettison toilet waste. There has been little outcry about these occurrences, however.
Often during airshows, colored smoke trails can be seen. These trails are generated by colour dye in a cartridge at the exhaust of the engine.
Fertilizers and pesticides are sprayed over large fields from low flying aircraft. In the Vietnam War, the defoliant Agent Orange was sprayed in order to remove the leaves from the trees.
- ^ http://www.rense.com/general11/chmmill.htm
- ^ http://www.csicop.org/si/2001-11/conspire.html
- ^ http://www.navarrone.com/contrails/chemtrails1.html
- ^ http://www.rense.com/general4/fre.htm
- ^ http://www.carnicom.com/contrails.htm
- ^ http://www.carnicom.com/flame1.htm
- ^ http://www.fas.org/sgp/congress/2001/hr2977.html
- ^ http://www.fas.org/sgp/congress/2002/hr3616.html
- ^ http://thomas.loc.gov/cgi-bin/query/D?c108:2:./temp/~c108T7GfbK
- ^ http://www.altnews.info/chemtrails/chemtrailsmokinggun.html
- ^ http://books.nap.edu/books/0309043867/html/index.html
- ^ http://www.lasvegastribune.com/20050909/headline4.html
- ^ http://www.columbusalive.com/services/services.php?story=columbusalive/services/about.php
- ^ http://www.rense.com/general18/mn.htm "Stormy Weather", 22 December 2001
- ^ http://www.willthomas.net/Convergence/Weekly/Chemtrails.htm
- ^ http://www.nmsr.org/pilotsvu.htm
- ^ http://iangoddard.net/contrail.htm
- ^ http://www.navarrone.com/contrails/chemtrails1.html
- ^ http://www.carnicom.com/taylor1.htm
- ^ http://www.carnicom.com/af1.htm
- ^ http://www.corpwatch.org/article.php?id=11081
- ^ http://www.alternet.org/columnists/story/11175
 External links
 Pro-chemtrail theory links
- http://www.willthomas.net/ William Thomas - Investigative journalist who first reported on Chemtrails
- Chemtrails - Spraying our Sky — Interview with someone claiming to be a scientist in Project Shield, supposed to be multinational is the secret program to combat global warming.
- Aerosol Crimes and Cover-ups — allegations about government cover-ups
- Chemtrail FAQ from Rense website — conspiracy FAQ attributed to the organization Blue Skies International
- Chemtrail Central — Pro-Chemtrail Theory
- Educate Yourself — Suggests using Orgone to combat chemtrails
- Anomalies Unlimited — Against "secret human experimentation"
- apfn.org — American Patriot Friends Network
- Lightwatcher.com — site with "proof of global geoengineering projects"
- Weather Wars — Weatherman Scott Stevens examines the chemtrail phenomena and man-made weather
- Etheric Warriors — claims solution to chemtrails, among other things
- Tearing Down the NWO Strongholds — methods of protection against chemtrails
- AltNews.INFO Chemtrails — Documenting the heavy Northern California chemtrailing activity
- Chemtrails911 — Evidence of chemtrails: US legislation & patents, military reports, videos, photos, news articles
- Holmestead chemtrails index — Large archive of articles relating to local chemical spraying in Canada
 Image links
- Chemtrail central image search — searchable database of purported chemtrail images
- Rense.com chemtrails data page — Links to purported chemtrail images and other resources
- http://www.willthomas.net/ Over 200 images and extensive information on Chemtrails and How To Stop Them.
 Skeptical links
- hans-egebo.dk — anti-chemtrail opinion
- New Mexicans for Science and Reason — a chemtrail debunking page
- Iangoddard.net — contrail analysis
- Crank Dot Net — skeptical website listing chemtrail resources
- lacarte.org — collection of chemtrail debunking sources
- Contrails- or 'Trails-con?' — A comprehensive look at what the author considers "A hoax;" Includes a timeline
 Chemtrails / persistent contrails in the media
- NBC News 4, Los Angeles: Toxic Sky? — short televised report into chemtrails in the Los Angeles area, and the wider implications
- BBC Horizon: Global Dimming — documentary claiming global dimming is being caused by persistent contrails
- BBC: Why the sun seems to be dimming
- BBC: Telescopes 'worthless' by 2050
- Las Vegas Tribune: Chemtrails are over Las Vegas — part 1
- Las Vegas Tribune: Chemtrails are over Las Vegas — part 2
- Chemtrails being taught in schools