EnvironmentJet 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 News
EnvironmentAnother extreme low for Antarctic sea ice signals a permanent shift An area of missing Antarctic sea ice twice the size of Texas adds to concerns that the ice has seen a lasting “regime shift”, with consequences for ecosystems and global ocean circulation News