What i think about it; not SO familiair with the exact subject…
But, in first place i think it is possible a plane can make a white stripe only due to exhausting gasses in combination with certain weather circumstances.
But, when i get more into the object; i've seen some stuff were people told there are supplements added to the kerosene. (or else an extra tank with chemicals on board of a plane that is unloading while the plane is on a flight)
There is some information findable about this subject.
What i've seen with my own eyes; on a warm sunny day (without clouds in the sky) i saw some planes flying over, all seemingly about having the same height/altitude) And they were less or leas the same planes (as in; commercial airline planes)
The one plane made a huge white stripe/trail on his back. The other plane didn't. Then one another came in flying from my point of view and he did have a trail….. And then some again with a trail…
So that doesn't seem logic as how the popular explanation is send out…. If these planes are flying on the same day, on the same altitude, in the same hour, in the same weather-circumstances….
Why does plane 1 make a trail and plane 3 doesn't make a trail….
I'm just using simple farmer-logics and i think that's better than trying to explain everything untill the crazy….
My English isn't that good but i like to discuss this subject further.
What do you think about these trails?