Jets don’t decide whether to leave a contrail or not — it just happens.  The hot jet exhaust interacts with the lower-temperature atmosphere, and contrails form.  Scientific American states that the “nature and persistence of jet contrails can be used to predict the weather… thin, short-lived contrail…a sign of fair weather…whereas a thick, long-lasting contrail…can be an early indicator of a storm.”  I am leaving wakes all day, every day as I interact with people and things. What is the nature of the wake I leave?  Am I going for persistence in what I leave behind?

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