http://educate-yourself.org/ct/

The above link will bring you to the site that the full conspiracy theory was posted. On this site, I’ll break it down and explain why the theory is false.

Anybody who reads conspiracy theories knows about ‘chemtrails’. According to theorists, these are chemical agents sprayed in the air and are designed to look like contrails, which are clouds of sublimated H2O that airplanes leave. So let’s see how true this theory is.

The link posted at the beginning brings you to Educate-Yourself, which is renowned for not posting evidence of its theories and simply demanding that you listen to them (they justify this lack of evidence by saying that people should educate themselves, instead of relying on them). As a result, it’s nearly impossible to argue against them, since there isn’t anything to argue. This makes it necessary to follow their links. So the first link we’ll follow is:
http://educate-yourself.org/lte/chemtrailsoverpenn04may07.shtml
This is E-Y editor Ken Adachi’s response to a reader asking about the difference between “airplane exhaust” and chemtrails.

You’re seeing chemtrails. Commercial jet engines burn fuel so efficiently that you would never “see” exhaust fumes, especially from such such a great distance, and they couldn’t possibly contain enough particulate matter to be seen as a plume.

Wrong. All exhaust systems release one similar gas: water vapour. When released into extremely cold conditions (-40 degrees C), this vapour a) condenses into water, or b) freezes directly from a gas to solid ice in a process known as sublimation. This is almost exactly what happens to normal clouds.
Plane leaving contrails behind. Note how the vapor lines up exactly with the engines.
Notice how the water vapour lines up directly with the engines, and how there is a large space between the engines and the contrail. This more or less proves that these aren’t chemtrails; aluminum, even in the most minuscule proportions, would have turned this space white, and barium would have made it green. So it appears that even the DENSEST trail is metal-free.
The normal response is then “Not through the engines, Spray nozzles are used”.
But spray nozzles are yet to be featured in ANY chemtrail video.

You wouldn’t even smell fumes if you were standing relatively close to the plane with their engines running.
Obviously Mr. Anachi hasn’t spent much time near jets. Jet fumes have a rather strong smell. Because I’m a nice guy, I’ll even give you a link: http://www.airliners.net/aviation-forums/general_aviation/read.main/388110/

How many times have you’ve flown on a commercial jet and could “see” any sort of visible exhaust plume coming out the rear of the engine? Never, right?

contrail
contrail

Notice how in both of these images the contrail is only visible behind the plane. Most airline passengers don’t see these because most airplanes aren’t fitted with rear-view mirrors.

There are now a lot of disinformation web sites on the internet which try to convince people that they are seeing jet engine “exhaust” or the “formation of cirrus clouds” from jet engine exhaust, etc.. It’s nonsense, utter bogus nonsense. The “explanations” being offered up by these disinformation web sites to account for chemtrails are so preposterous that it doesn’t deserve serious discussion.

I presume that this is Mr. Adachi’s justification for why he hasn’t returned my and countless others’ emails asking him for proof of chemtrails.

Let’s go to the next article:
http://educate-yourself.org/lte/chemtrailsfakeornot15jan08.shtml
Ah, here’s a good one. Here’s yet another one of Adachi’s replies to skeptics. Instead of evidence of chemtrails, though, he decided to educate us as to who’s in charge. I’ll let you read the whole article, but here’s the best part:
Those at the top are usually reptilian shape shifters or are human/alien hybrids. Most are not normal human beings in any sense of the word. Although they may APPEAR to be human, they are not human. Someone who has access to much higher inside information than I, had it confirmed that about 70% of the US Senate are reptilians masquerading as human beings.
……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
………I honestly don’t know what to say to that. Conspiracy theorists, is this your source of information?

Here’s an interesting one:
http://educate-yourself.org/lte/blackberamsandshadows15oct08.shtml
Mr. Adachi seems convinced that mystical ‘black beams’ are being projected and somehow assist chemtrail sprayers. He’s wide off the mark.
These black beams are shadows cast by contrails. A full explanation can be found here:
http://contrailscience.com/contrails-dark-lines-chemtrails/
The most interesting type of contrail dark line is when the contrail is lined up with the sun. This produces a slice of shadow through the atmosphere that looks like a dark line when viewed edge-on. It is quite difficult to visualize what is going on since you have to think in three dimensions, and we are accustomed to thinking of shadows as being flat, since they are usually cast on surfaces. You are not seeing a thin dark shadow here, you are actually seeing a huge slab of very faint shadow, but it’s viewed from looking along the edge. Imagine you have a thick sheet of glass. Viewed head on, it’s transparent, but if you look at it from the edge, it seems a lot darker…Given the line (contrail) and direction vector (sun) we can form a plane that contains the line, and is parallel to the direction vector. This plane cuts through the contrail, the atmosphere, and intersects the ground. Projecting two end points of the contrail along the plane in the direction of the sun’s vector, we get essentially a two dimensional parallelepiped (although the far edge is not very well defined). This parallelepiped is quite thin (it’s as thick as the contrail), so when viewed from the side, you won’t see much. But when the viewer is in the plane of the parallelepiped – specifically anywhere along the line on the ground formed by the intersection with the plane formed by the contrail and the sun – then they will be viewing the parallelepiped from edge-on, and so it will seem to be a dark line that intersects the contrail.
I promise you, it’ll make more sense when you read the link. Here’s a picture of a shadow:
Contrail Shadow above Mallorca
Notice how in the above picture, the black beam can be seen on ground and water as well as the sky. This is more or less proof that it is a shadow.
Another problem with the ‘black beam’ theory:
Think of a mechanism that will project black into a sunlit sky. There are none. The only part of a sky that can be black is a part where the sun is partially blocked by something. Common sense can answer a lot of questions.

UPDATE

Here’s an explanation for how contrails form written in the March 1943 edition of Popular Science:
How contrails form
Contrails are formed by the exact same mechanisms today as they were in 1943, as explained above. Old propellor planes used fuel which is essentially the same thing used in modern day jets. The engines release water vapor, and contrails form if the conditions are right. It even states that contrails “can last for some time”. It also provides an explanation of how vortices create contrails. Keep in mind that even the most deranged chemtrail theorists don’t say that chemtrails have been around since 1943.

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