Birdwatch Note Rating
2023-05-12 11:36:12 UTC - HELPFUL
Rated by Participant: 94CB2B626F650CC9FE1069226749B2AAA2DD1EF3AFE40A621CAA8B2379AB7C6D
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
All Note Details