What are they?

cool - so you tested an actual chentrail to see what they are made of? Or are you just here to make another useless proclamation based on the impression you wanna assert that you speed read a propaganda book children are told to read? Please tell us of your pilot training , your ability to shadow a pathflight and the equipment and procedures used. go!

When you burn something it makes CO2 and H20

The h20 makes water vapor when it leaves the engine and cools and makes a trail. On high humidity days the vapor cant dissolve into the atmosphere and stays as a trail.

If you look for "chemtrails" youll see they always occur where theres high humidity. When theres low humidity they get dispersed into the atnosphere too quickly to leave a trail.

I mean, its possible that they are using the chemtrails as masking for other nefarious things, but the trail itself is just water vapor.

Sounds legit. Ty for explain

So based on your logic ( i mean lack thereof) when i breath out - since its made of H2o and Co2, it should leave a persistent contrail a 100 miles long that last for days?
- hmm ok, go go gadget chemistry pretender....nice larp.

Maybe not 100 miiles.. but you can get up to a few feet with practice on a cold day.

Your breath isn't anywhere near the water content of burning jet fuel, so you will only get a vapor trail under more favorable conditions to vapor formation (i.e. freezing temperatures). If you increased the water content of your breath several times over you could make a vapor trail out of your mouth.

What you are doing is describing a contrail and conflating it with a chemtrail. Contrails dissipate , like your breath on a cold day. Chemtrails linger around for days and places like NASA, Harvard and the Government have admitted to Geoengineering and secretly spraying our sky and the information has not been presented on the MSM or where you get your truth from as this helps maintain the misinformation your programmed to parrot. But again a little information doesn't mean any of it is true.

https://www.forbes.com/sites/trevornace/2018/12/05/harvard-scientists-begin-experiment-to-block-out-the-sun/#372eb6d40c24
https://sorendreier.com/great-now-bill-gates-wants-to-block-the-sun/
https://www.alphr.com/science/1010254/scientists-look-to-block-out-the-sun-to-combat-global-warming
http://themillenniumreport.com/2017/11/government-finally-admits-chemical-geoengineering-via-chemtrail-operations/
https://youtu.be/WBG81dXgM0Q - CIA DIRECTOR JOHN BRENNAN ADMITS TO CHEMTRAILS (STRATOSPHERIC AEROSOL INJECTION)
https://www.geoengineeringwatch.org/nasa-admits-chemtrails/

and as for burning Jet Fuel - can you compare a Combustion based car engine and a jet engine after say three years of use and explain any noticeable differences? Please do that ok?

The length they stay around isn't indicative of any kind of additive to the trail. It's based on the humidity. Like I said, they might add some things to the trails, who knows, but the fact that they linger isn't indicative of additives.

Yeah, lots of organizations have done experiments with the atmosphere. One notable one was attempts at cloud seeding to decrease temperatures (probably what your "block out the sun to combat global warming" article is about). That doesn't mean it's nefarious, and doesn't change the fact that how long the trail stays out is dependent on the atmospheric humidity.

when i was a kid, planes did not leave persistent contrails that last for days, i've seen pictures of skys know where it's full of 30 distinct trails. Geoengineering is "nefarious" because global warming is a myth and many people dont agree with the consensus of Low IQ People. Modifying the weather for something that science cant prove because a few gullible people dont even know what real Science is aside from how to spell it and getting a stiffy when they hear it said on the news, is quite a dangerous precedent. And like you who at first will not admit to chemtrails and then after showing you some proof , immediately jumps to the "but they're not dangerous" excuse, doesnt prove that is what they are - just what they are willing to admit to, in other words - misinformation excuses to dispel legit questions.