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Well jet travel and chemtrails are not the same... jets can and Di contribute to stratospheric pollution but the fumes from it are mainly water and co2, which dissipates rapidly.
Chemtrails.. as I discussed here, are different and deliberate, not a byproduct of jet flight. It doesn’t even come out if the engine emission, it has sophisticated spraying mechanism on the planes

And the airplane mechanics are unaware or all in on it?

@funbobby51 there have been whistleblowers out of the team of pilots engaged in such spraying. I have shared one such video of a USAF pilot in this post.

I watched the one with the girl who wanted people to send $50 to a secret laboratory.

@funbobby51 - whats your opinion of it?

I assume she is operating that laboratory and pocketing the $50.