Streets Loc: Euless, TX.

Orrrrr if the photographer could find an actual contrail. They are very short and usually last only a few seconds. Chemtrails last for hours.

boberic Loc: Quiet Corner, Connecticut. Ex long Islander

While there is exhaust from a jet engine, and I certainly would not want to breathe it. so called chem trails are merely vapor trails and are completely harmless

Haydon

I beg to differ....there are still people suffering from Chemtrails from the 60's. Just not as many anymore :)

Streets Loc: Euless, TX.

Me thinks that you replied to the wrong individual.

boberic Loc: Quiet Corner, Connecticut. Ex long Islander

And just how are they suffering? And how did "chemtrails" cause their suffering.

chaman

Haydon

I think you failed in seeing my tongue in cheek with my reference to the 60's and chem trails. Sorry about that. It was a bad "Timothy Leary" joke.

Streets Loc: Euless, TX.

One would think that a photography forum like UHH would not be frequented by people prone to ridicule others. Ridicule is a weapon of the weak in spirit, and when used against the strong causes no casualties.

Bobspez Loc: Southern NJ, USA

An interesting topic. I read the full report cited in the Smithsonian article.
http://iopscience.iop.org/article/10.1088/1748-9326/11/8/084011/meta

The conclusions were based on surveys and scientist reviews of chemtrails websites and claims. Part of the problem seems to me to be that the majority of what is seen in the sky are actually contrails, ice crystals formed by jet exhaust water vapor (which can last for hours depending on humidity and atmospheric conditions), so the chemtrails, also known as SLAP, Secret Large scale Atmospheric Spraying, if they exist, would be secret operations hidden in plain sight.

The other problem is one of logic, it's not possible to prove a negative assertion. So the assertion that chemtrails don't exist can not be proven. In the study, 78 of 79 scientists concluded that they fouund no evidence for the existence of secret atmospheric spraying programs, not that they don't exist. Much the same, no one can prove UFO's don't exist, or that I'm not a millionaire, even though no evidence has been brought forward to conclusively prove any of these assertions.

Finally, I for one don't see any motive for the existence of chemtrails. Industry is already polluting the planet in plain sight. Why engage in secret pollution as well? And from a practical point of view, whether all, some or none of the assertions are true, hiding from cell phones, wifi, electro magnetic radiation, chemicals in food and water, air, mass brainwashing by the media, etc. is just too much trouble. It's not like we all aren't going to die anyway.

Streets Loc: Euless, TX.

It may be too early to be conclusive, but I have seen, and I'm guessing here, a drastic reduction in chemtrails since President Trump pulled us out of the Paris Climate Accord. I would like all doubters to do this one thing: if you see a long white trail in the sky, note the time and location. Check the same area of the sky the next day at the same time. If it isn't there again than it is not the result of a regular commercial flight.

Bobspez Loc: Southern NJ, USA

We are surrounded by military bases where I live. When there was a call up a few years back, there were jets taking off and flying over continuously for hours. A lot of air traffic here are military jets, not commercial flights. Plus private jets can fly any time. There's still no reasonable motive for spraying the whole country with chemicals. They could just as easily put it in the water or in the food. In Flint Michigan and other places you can see the chemicals in the water. There's no secret about it.

Streets Loc: Euless, TX.

You seem to be thinking that chemtrails are sprayed to purposely harm the people. I am of the opinion that they are aimed at climate control or to work in conjunction with HAARP to aid in long range communication or some form of tinkering with the ionospheric layer. I have no positive knowledge of their use, only that they exist. According to my doctor, he believes that chemtrails are responsible for the upsurge of respiratory problems that he is seeing.

Longshadow Loc: Audubon, PA, United States

Won't wind currents move or dissipate the contrail? I've seen them slide right away on a windy day. It depends on the winds and humidity level in the atmosphere. I've seen short contrails that are not much bigger than the plane, and long ones that last a while.

krl48 Loc: NY, PA now SC

The base of the ionospheric layer begins approximately 50 miles above the earth, or about 200,000 feet above the cruising altitude of commercial and business jets. I doubt any "tinkering" of the ionosphere can be done when you're that far below it.

It must be difficult to shoot pictures with all that tinfoil on one's head.

TheDman Loc: USA

One would not think a photography forum like UHH would attract people who are so deserving of ridicule, but here you are.