I worked in the industry many years ago and have been on hundreds of flights - contrails are not the same as chemtrails/atmospheric aersols. Contrails (normal aircraft omissions) do not linger like chemtrails do - they disperse very quickly:
Why are we even debating this, the govt are not even hiding it now:
(Includes video report)
Geo-enginerring has even been used in wars/the 60s:
Absolutely depends on atmospheric conditions at the time whether they last a few minutes or an hour,just like clouds.
Contrails do not linger for hours and hours no matter what the conditions are, but believe whatever you want to believe 
There’s no such thing as a ‘tipping point’ Bruce, it’s a conspiracy theory (yes the Establishment can also produce conspiracy theories) derived from computer modelling fed by misinformation and dubious input to back up the theory. It’s then fed to the main stream media to brainwash the masses into believing that the planet is on it’s last legs and it’s all their fault… 
If there is a mess for our grand kids and great grand kids to clear up, it will be a mess caused by the rich and powerful messing around with the atmosphere and the natural balance of things.
And why do I get the impression that we are all being conned, especially by David Attenborough and the BBC when they try so hard to convince the masses that man made global warming is all down to us when they show stuff like this…
You might not like Trump or Putin, but they can see through this massive con that’s been dumped on the masses. Wake up People!
But is it not true that water vapour trails from an aircraft’s engines can last for hours - if the atmospheric conditions (humidity, wind, etc.) are suitable? They can be seen for hours even if a light wind is dispersing them into wider and more irregular trails.
I see lots of commercial aircraft pass over the skies near me. I can track them on any of the apps that allow tracking of commercial flights. Some leave no trail, some briefly leave a trail and some leave a trail that sits in the sky for hours. All are normal commercial flights by well known carriers.
If it is only chemtrails that leave long lasting trails then how are these commercial aircraft dispersing the chemicals? Typically the aircraft are Airbus 320 or Boeing 737 aircraft. I happen to know both quite well, especially the Airbus. I know the construction of the wing of the Airbus from aluminium billets through final assembly, kitting out and shipping to Toulouse. There are no storage areas for chemicals and no equipment for dispersing such chemicals.
I happen to know the aircraft engine quite well too. Again, no storage or dispersal equipment. In fact for both wing and engine, there is no space for chemical dispersals either.
So how are such flights leaving chemtrails and are not, in fact, simply leaving vapour contrails - some of which are visible for some time?
Thanks for posting Robin, spot on.
We already knew that really, but lots of people are being brainwashed by the media to justify the eye wateringly expensive move to ‘sustainable’ energy which is absolutely ‘not’ sustainable, like everything else there is no such thing as a ‘Free Lunch’ the costs financially and to the planet are just distributed differently. Somebody is making a shedload of money (and control) from this global con…
From 1983
You’ve got to ask yourself…Who are the conspiracy theorists?
I think most people have got it the wrong way round…It’s the establishment and MSM.
More and more people getting fed up - especially those of an age who remember our clear blue skies, and which wasn’t all that long ago (so they can’t say it’s because there are more planes!)
Flight numbers worldwide have gone up by two third in the last twenty years. So there are actually more planes in the sky.
Here is another explanation on how everything is not getting explained in detail
More official admissions of them doing it:
There is no flight path near my house . Maybe the odd helicopter flying over or private plane . The noughts and crosses of chemtrails above my house is shocking at times . I find it strange that no one else looks up , or they say they are contrails , how can they be when there is no flight path . No one believes, even my son who is air crew says contrails . We get maybe 3 days of sun then the next day there they are up above spraying.
Next time you see a contrail being made just look on Flight Radar for your area and you will be able to tell the airline, type of plane, destination and all sorts of handy information
There is a marine tracker too if you are near the sea.
How long a con trail lasts is simply based upon the atmosphere the aircraft is flying in. A contrail lasts much longer in cold, humid air. The temperatures at altitude, even on a nice warm day, can be sufficent to cause the contrail to freeze, thus lasting much much longer.
In the same way, on a warm, low humidity day you do not normally see car exhausts. But on a cold, humid day, you often do.
And both highly polluting Geli, even if they are not spraying anything.
The rumour about ‘chemtrails’ was probably started by the establishment.
While we concern ourselves with chemicals being sprayed which can easily be proved wrong, we are not dealing with the real problem of contaminating our upper atmosphere with the burning of thousands of tons of jet fuel. And what goes up, must come down.
Exactly & cars do as much damage to our atmosphere as aircraft & if anything cars, due to their numbers, cause as much, if not more damage. The height is immaterial, as fumes are in general lighter than air & thus rise. Which is why smog was an issue. It was caused by cold, moisture heavy atmosphere (weather.) Which kept the fumes low & caused more suffering to humans more quickly, more visably. In the same way contrails are more visable when conditions are cold & humid at that altitude.
