Birdwatch Archive

Birdwatch Note Rating

2023-05-12 14:18:48 UTC - HELPFUL

Rated by Participant: 6D6F54D4A92173E321F861F2BFACD7A1AB195510F77F5D7960B89C8D0A9B74BA
Participant Details

Original Note:

Contrails are line-shaped clouds produced by aircraft engine exhaust miles above Earth's surface. Contrails are composed primarily of water, in the form of ice crystals. This phenomenon is reproducible via many experiments. Contrail properties observed and studied since 1920s https://www.nasa.gov/sites/default/files/atoms/files/contrails_k-12.pdf

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