Birdwatch Note Rating
2024-06-03 00:34:24 UTC - HELPFUL
Rated by Participant: B156FC3FB75C2CB1BA60D295D59F07A5D1B94FA13D08A9D72F354B436BF7EC7D
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Original Note:
Contrails, short for "condensation trails" or vapor trails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at cruising altitudes above the Earth's surface. They are composed primarily of water, in the form of ice crystals. https://www.faa.gov/sites/faa.gov/files/regulations_policies/policy_guidance/envir_policy/contrails.pdf
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