>It's chemicals
Kek. It's water vapor in aircraft engine exhaust condensing at altitude.
>it's a carpet, farty!
It happened with single engine aircraft in dogfights as well. It's refereed to as 'Aircraft Induced Cirrus cloud cover'.
Chemtrails are a fantasy engaged in by weak minds, Anon. Aircraft operations induce cirrus cloud cover. Lots of sources and references and photographs have been posted here describing the well-known and well-studied phenomenon of aircraft-induced-cirrus.
Not much of an argument there, Anon.
>It's not some government conspiracy, it's a byproduct of fossil fuels.
…and a tremendous increase in air travel.
>Water vapor dissipates very rapidly, while chemicals remain visible for hours.
Do you have a source for your assertions?
Here's two sources on contrails forming in and becoming cirrus cloud cover:
Most long-lived contrails form within cirrus clouds
Analysis of seven years of humidity observations by instrumented passenger aircraft shows that conditions promoting long-lived contrails are fulfilled most often in regions already covered by subvisible or visible cirrus: ~90% over the Northern midlatitudes and almost 100% in the Southeast Asian subtropics, approximately equally distributed among visible and subvisible cirrus clouds.
https://www.nature.com/articles/s41467-025-65532-2
A Case Study on Aircraft-Induced Clouds and Natural Cirrus
Aircraft-induced clouds (AIC), consisting of persistent contrails and contrail cirrus, contribute over half of effective radiative forcing (RF) to the aviation effect on climate.
https://ui.adsabs.harvard.edu/abs/2021AGUFM.A45M2020W/abstract
https://www.faa.gov/contrails
>stratospheric aerosol injection
SAI is a proposed technique for limiting solar radiation.
>I see,
You don't see much, Anon. All you have is name-calling when you disagree. It's entirely understandable that you are frustrated.
Again, you have no argument, just a public tantrum.
Contrails simply turn into cirrus clouds. It's been very well documented here and elsewhere:
Most long-lived contrails form within cirrus clouds
Analysis of seven years of humidity observations by instrumented passenger aircraft shows that conditions promoting long-lived contrails are fulfilled most often in regions already covered by subvisible or visible cirrus: ~90% over the Northern midlatitudes and almost 100% in the Southeast Asian subtropics, approximately equally distributed among visible and subvisible cirrus clouds.
https://www.nature.com/articles/s41467-025-65532-2
Since you are unable to address the sourced information you seek to minimize inconvenient facts through false associations. The information on contrails and aircraft-induced-cirrus has apparently shaken your belief system, Anon.