Birdwatch Note Rating
2025-01-25 22:50:10 UTC - HELPFUL
Rated by Participant: A1CDADBC0B4E5DBAB8313E60213DF956A34E2B060ACAB1ABBDB77B2E2E3CD36D
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Original Note:
These contrails are normal and have been a common occurrence since the beginning of jet aviation. Contrails are condensation trails that form when hot, humid exhaust from a jet engine mixes with the cold, dry air at high altitudes. https://www.faa.gov/sites/faa.gov/files/regulations_policies/policy_guidance/envir_policy/contrails.pdf Contrails photos through history 1991-1940: https://contrailscience.com/contrail-photos-through-history/
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