Chemtrails definately do NOT exist! The aviation industry has much other things to do as to let rain Barium and Aluminium powder over the whole world....
The German Umwelt Bundes Amt (UBA
) has clearly confirmed, that Chemtrails do not exist. Every meteorologist tells the same. The sometimes weird shape of contails get developed by certain atmosphere, moisture and wind compositions.
And those contrials have been spotted in the 60's / 70's and 80's as well.
Here the link from Bundes Umwelt Amt. (Sorry only in German)
Aviation! That rocks...