The word chemtrails seems to be a conspiracy word that most people disregard.
There is thought that the trails left behind from planes in the sky, is an attempt to control our weather systems from the government with little regard as to the health effects it has on most people. Aluminum Oxide is thought to be the highest chemical released, over 20,000,000 tons per year into the atmosphere.
Aluminum, is also, the largest chemical known to cause neuro-degenerative changes and why the vaccine issue is so prevalent still, especially with the MMR.
The following is a website that highlights the issue. Worth a glance.
http://www.geoengineeringwatch.org
What are your thoughts regarding?