[The Apprentice]

The planes only leave persistent vapour trails in areas if the sky where wind, temperature, dew point and humidity allow at the altitude they are cruising regardless of what's in the fuel ? These factors all vary during the course of even an internal flight .
I thought the idea of "spraying" was to have control of the trails and how long they last . How much of a particulate such as aluminium whatever could you add to a fuel to treat 100 miles or more of sky , and have it burn efficiently in the engines ? There are still those who say it's sprayed from hoses .
After seeing a few videos and writings on the subject , I'm not convinced about "chemtrails" .

Ice age documentary looks interesting .

Below is a picture taken from our back garden, what we are looking at is the North - South corridor route taken by the high flyers, 30,000 plus and in it are lots of trails at differeing spread patterns, an hour before this was taken in mid afternoon the skies were as clear as can be.

The build up lowered the warmth dramatically where without the blocking nature of this manmade cloud it would have been a tad warmer as the sun was just beginning to go down.

Looking due West, wind direction West to East light breeze at ground level.



Aluminum on its own would not survive the heat of the engine unless it was a larger sized particle and became nano sized after going through the heating process.
Now I came across this interesting photo of a device being made by a local company which the title of the photo says aero engine mixer, Darchem is the company name.



If this device was being used inside the engine to mix liquids with air into a mist and put through the out channel of a turbojet engine like the one below, chemicals  could survive the compression stages, thus adding the ingredients to the fuel would work as intended.
Such ingredients could easily be added to fuel and named anything so as not to raise concerns, just a thought.

Notice the picture below does not designate the outer jacket and arrow, here is where alternative liquids could be added a run through the engine without much damage.