Quote:
Originally Posted by Imp
A far simpler explanation is modern jet engines put out less emisions, these also produce finer particles which with the right atmospheric conditions hang in the air & produce what you see.
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These are different than normal contrails,which evaporate in abit behind the jet. They spray it back and forth in straight lines. You can see the lines stop and start,turning the spray on and off. After some time the spray disperses into thin cloud layer. Why it's being done who can say but one thing is certain.
This is not normal.