Contrails Are Not Smoke.
Jet exhaust carries water vapour made when the fuel burns. The vapour condenses into droplets that freeze almost at once.
What this video covers
– A contrail is not smoke. It is a real cloud, made of ice.
– The vapour condenses into droplets that freeze almost at once.
– Lower down, where the air is warm, it hardly forms at all.
Related video
Why You Should Never Run From a Bear
Sources
Wikipedia: 飛行機雲 https://ja.wikipedia.org/wiki/飛行機雲 (accessed 2026-08-26)
How this was made
Narration: Kokoro TTS (Apache-2.0) / af_heart
Music: Generated locally with Stable Audio Open 1.0 (original, no third-party rights)
Diagrams drawn with Python/Pillow. Photo shots generated with ChatGPT.
This video contains AI-generated audio and images.
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