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Some people think that all contrails dissipate fast… which is completely incorrect ❌Some contrails are short because the air the aircraft is flying through is too dry for the ice crystals to survive.In simple terms:• Jet exhaust always contains water vapour.• A contrail forms when that vapour freezes into ice crystals in cold air.• Persistence depends on humidity, not the plane.If the relative humidity with respect to ice (RHi) is low (e.g. 20–40%):• Ice crystals sublimate almost immediately• The contrail forms briefly behind the engines• Then it vanishes within seconds = short contrailIf RHi is high (100%+):• Ice crystals survive and grow• The contrail persists and spreads into contrail cirrusSo short contrails = dry upper air, not:• switching sprays on/off• fuel dumping• different “chemicals”Same aircraft, same engines, same exhaust.. different atmosphere.#chemtraildebunker #contrailsnotchemtrails #StayInformed #doyourresearch