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<p>[QUOTE=&quot;lehmansterms, post: 4458675, member: 80804&quot;]What? You&#039;ve never heard of &quot;chemtrails&quot;? </p><p>(&nbsp; ;&lt;{D}</p><p>This is one of the least plausible of the silly CT (conspiracy theory, not Coin Talk) concepts wholly bought and unquestioningly believed by people addicted to paranoia; and, evidently to the endorphins released when they wallow in their their fears.</p><p>The &quot;theory&quot; is based on the visible water-vapor contrails which precipitate out of the air as planes perturb still places where water vapor may be (and in fact is) slightly below the temperature necessary to become fine water droplets which become visible as a wispy, smoke-like trail, appearing, from the ground, to be released from the planes.</p><p>This is a perfectly normal phenomenon, but if you live relatively close to a major airport, on a clear, windless day you may see dozens of contrails crossing the skies.</p><p>The conspiracy theorists are convinced this is a spray of concentrated, mind-altering chemicals (hence &quot;chemtrail&quot;) that nefarious actors of rather uncertain movements or goals are using to brainwash and mind-control vast numbers of people.</p><p>Unfortunately I know all too well about &quot;chemtrails&quot;, my daughter&#039;s father-in-law is a firm believer and he&#039;s told me all about this commie plot in great detail. All the more amazing as he owns a machine shop which makes specialized replacement parts for aircraft and so should be well-connected to the realities of aviation, however...</p><p>There&#039;s simply no convincing him that he and whichever ridiculous daytime AM radio fear-foghorn he&#039;s getting this from is silly beyond belief. </p><p>The amount of material a plane would have to carry to spray a visible trail hundreds of miles long would exceed its rated lift capacity - and severely cut into the all-important profits made by transporting people and goods.</p><p>Interestingly, based on the couple of weeks of flying moratorium post 9.11, it appears that shade thrown by contrails actually may have a measurable effect on the ground. The average temperatures were slightly - but measurably - higher during the time the skies were 100% clear of civilian aviation. It appears that although the effect is miniscule, contrails as &quot;miniature clouds&quot; are actually helping keep ground temperatures a tiny bit lower than they would otherwise be.[/QUOTE]</p><p><br /></p>

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