The contrails also have a climate effect via cloud formation. https://iee.psu.edu/news/podcast/growing-impact-contrails-and-climate-change https://iee.psu.edu/

The contrails also have a climate effect via cloud formation. https://iee.psu.edu/news/podcast/growing-impact-contrails-and-climate-change https://iee.psu.edu/news/podcast/growing-impact-contrails-an... This was in the news recently as Google removed this aspect from its flight GHG impact estimate as it was averaging over all flights, and intends to adjust it in future so that flights at the time of day that create contrails will have more GHG impact attributed to them.