This is absolute tosh, but look at how convincing it seems.
Firstly, a conventional prop engine can leave trails; we have all seen the WW2 photos of battles over London.
Helicopters do not usually fly high enough to make a trail.
Kerosene produces 1.3 tonnes of water for each tonne it uses.
Yes you can get trails on takeoff if it is cold enough, below -45 C.
I have seen people say “they turned on the chemtrail button too quick”.
Please donlt fall for these ideas, they are not necessary and lead to being ridiculed.
Of course turbofan engines make trails.
The information about turbofan engines was said to come from an expert in aviation, but when I checked it was a lie.
Willem Felderhof did not say turbofan engines don’t make trails.
Russ Tanner or Dane Wigington must have been away of their deception because they continued with it after the truth was told.
Turbofan engines definatly make trails but in modern times, those trails have enhanced groeth abilities due to the hygroscopic sulfur-coated metallic particles that exit the exhaust because they are in the fuel.