It is obvious that chemtrails are being used to control weather and climate. It is also obvious that this is causing health detriments (asthma, A.D.D, alzheimers etc). Plantlife is affected. Blue skies are a thing of the past. Strange weather patterns are occuring.
Watch this documentary if you are unaware of this or before you sign this petition. http://www.youtube.com/watch?feature=endscreen&NR=1&v=mEfJO0-cTis .
Here is another link with some supporting information from 2006.