A video of white plumes coming from the tip of a plane’s wings has been shared on Facebook with the caption “Chemtrails come from engines right?”
The post has over 700 shares on Facebook and 8,000 likes on Instagram.
It’s not completely clear exactly what the caption means. It may be referring to the fact that so-called ‘chemtrails’ (the conspiracy theory that the white lines emitted from planes are actually chemicals being purposefully sprayed to harm people) are actually usually contrails.
Contrails appear when water vapour, either already in the air around the engine or emitted from it, condenses around soot particles emitted from the combustion process due to cold temperatures at high altitude. This forms long thin lines of cloud. They can look…
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