F4Jock
Senior Member.
Vapor trails form from trailing edges on both takeoff and landing. They are fundamentally the same as a contrail but form under different conditions. [...] Google "Low level vapor trails." As for the Brits spraying, yep. They've admitted to some small-scale experiments.
No one disputes that weather modification has been tried. The discussion centers around volume and persistence.
You have no way of knowing that the altitude of the aircraft you observed generating and not generating contrails was the same. You cannot rely on eyeballing and guesstimating.
If you are "annoyed" by clouds I suggest you talk to either God or Mother Nature, whichever you choose to believe in. The problem is you have absolutely no fact or science-based evidence to support your positions.
No one disputes that weather modification has been tried. The discussion centers around volume and persistence.
You have no way of knowing that the altitude of the aircraft you observed generating and not generating contrails was the same. You cannot rely on eyeballing and guesstimating.
If you are "annoyed" by clouds I suggest you talk to either God or Mother Nature, whichever you choose to believe in. The problem is you have absolutely no fact or science-based evidence to support your positions.