eli5: Why do airplanes have a cloudy trail behind them?

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I feel like when I look up, 9/10 time there’s going to be a trail behind the plane, but if I go on a flight I never see it happen. Is it a specialty plane or something?

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6 Answers

Anonymous 0 Comments

Engine exhaust is mainly co2+water

Water + very cold environment – > water droplets which freeze – > cloud

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