"By now everyone has seen crisscrossing streaks of white clouds trailing behind jet aircraft, stretching from horizon to horizon, eventually turning the sky into a murky haze. Our innate intelligence tells us these are not mere vapor trails from jet engines, but no one yet has probed the questions: who is doing this and why. With the release of this video, all of that has changed. Here is the story of a rapidly developing industry called geo-engineering, driven by scientists, corporations, and governments intent on changing global climate, controlling the weather, and altering the chemical composition of soil and water — all supposedly for the betterment of mankind. Although officials insist that these programs are only in the discussion phase, evidence is abundant that they have been underway since about 1990 — and the effect has been devastating to crops, wildlife, and human health. We are being sprayed with toxic substances without our consent and, to add insult to injury, they are lying to us about it. Do not watch this documentary if you have high blood pressure."
Seems to be a lot of misinformation and guesswork that takes place on the chemtrail subject. What is clear is that spraying goes on and the chemicals include aluminiums, sulphur dioxide and barium. The experiments that go on are under the guise or in reality to manipulate the weather. These chemicals also appear in natural crops and are countered by companies like Monsanto who manipulate crops to resist these chemicals. Scary stuff that makes you feel very insignificant to those people who put themselves "in charge " of our natural earth. What is apparent to me and others is that spraying chemicals all over the world is an unnatural act and can only be detrimental to human and animal health. There is also a follow up to this film called "Why in the world of they spraying".
We know that the governments are historically involved in secret experiments in all kinds of mind boggling ways. We know that many of the Nazi scientist were never tried for war crimes but in fact went to work for America. We know chemical warfare is out there and these clever people are able to do what they like. We know there is a huge increases in modern times of neurology disorders. So dismiss this at your peril. Here's Alex Jones with his take on this last year in November 2011. (in two parts)
Some links to more in-depth discussion on Chemtrails and contrails you can find at the excellent site: