Jet contrails may cool the planet by day and warm it by night An AI-assisted analysis of satellite images suggests the vapour trails produced by aircraft have a net cooling effect in the daytime because they reflect sunlight back into space click this link to read full content. https://www.newscientist.com/article/2449212-jet-contrails-may-cool-the-planet-by-day-and-warm-it-by-night/