KnowraContrailLinked fromLinked fromThe 6 pages that link to Contrail, each with the reason it gives.All 6Broader topic 1Related 1Narrower topic 1Compared with 3Cirrus cloudCompared with: Persistent contrails can spread into cirrus-like sheets but originate from aircraft.Jet fuelRelated: Water vapor from jet-fuel combustion helps form contrails under suitable atmospheric conditions.Environmental impact of aviationBroader topic: Persistent contrails and the cirrus clouds they seed can trap outgoing heat.Cirrostratus nebulosusCompared with: Aircraft trails can resemble high cloud streaks but have a human-made origin.Chemtrail conspiracy theoryNarrower topic: The trails identified as chemtrails are ordinary contrails produced by aircraft exhaust.Cloud (meteorology)Compared with: It is a human-made cloud whose persistence can affect climate.