Quote:
Originally Posted by bart5050
I personally observe the great majority of persistant contrails to be coming from commercial craft though.
Since we observe opposite results it might have more to do with altitude, velocity, humidity, and other factors than fuel or craft?
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I would say so yes. At least based on research I've done. It may have something to do with area as well. Perhaps the locations you are observing are close to military training areas?
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