Videos like this do indeed show chemtrails.
http://orbisvitae.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=58301#Post58301I have been reluctant to comment, as people tend to be binary in their thinking. It is my opinion that chemtrails are real, but so are contrails.
The danger of over-rating a threat is every bit as great as the danger of under-rating it. Contrails are easy to confuse, but there are some ways of differentiating.
A real contrail does not appear until several plane-lengths behind the aircraft. It is caused by the decompression of the air which just got compressed by the aircraft.
There are two types of chemtrail, those employing sprayers and those using fuel additives. The sprayed chemicals appear pretty much immediately; the fuel-type has a small lag, as it isn't visible until the gas cools down a little.
So the only really tricky distinction is between fuel-based chemtrails and real contrails, as both will have a lag. One clue is that the number of exhaust streams is going to match the number of engines.
Other clues depend on gauging the speed and altitude of the aircraft. At high altitude and speed, it's actually difficult to design a craft that has absolutely no contrail. Even fighters leave short contrails which quickly fade.
At low altitude, aircraft are usually flying too slow to generate a contrail unless the humidity is exceptionally high or something.
Also, when humidity is high, it is possible for a genuine contrail to grow into a cloud. They don't always fade.
I do not suggest that people stop fighting - not at all. The chemicals in the environment are a danger. But don't get panicky every time a plane flies overhead.
I was skeptical at first because it makes no sense to poison oneself. I have concluded victims of evosickness have no sense. The evidence is more than convincing that they are stupid enough to spray themselves, so long as everyone else is getting poisoned.
When the mainstream began reporting on chemtrails, I was nearly convinced it was pure bluff. It isn't. Chemtrails are real, and show just what hypocrites the enviro-whackos really are.
I encourage folks to learn what's what and keep on fighting these clowns.