What are normal contrails? Short lived ones, the persistent ones which stay in form or the persistent ones which spread out?
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What are normal contrails? Short lived ones, the persistent ones which stay in form or the persistent ones which spread out?
The short lived ones. I call the other ones chemtrails.
Well all of them are actually normal, it depends on multiple things if the contrails are persistent ones. If I'm not wrong, they're more common in higher altitudes and flying in higher altitudes is more fuel-efficient for the planes.
The main issue with persistent contrails is that it increases the amount of clouds as "artificial clouds", so aviation industry and scientists are trying to find ways to reduce amount of persistent contrails.
Increasing the amount of clouds can be really handy if you're a government agency that is experimenting with weather modification and control.
There are some ways to control weather on some level, but flying airplanes in hopes of getting persistent contrails is not any way an effective way to control weather.