Cloud seeding does not create clouds or precipitation from clear skies. It can only be effective when clouds with the right ...

Contrails – short for condensation trails – are linear clouds made up of ice crystals that form behind jet aircraft at high ...

A committee-supported project or activity that has been completed and for which output dissemination has begun. Its committee has been disbanded and closeout procedures are underway. The National ...

If you look up at the sky on a clear day, chances are you'll notice thin, white clouds—also known as contrails—following behind airplanes. Subscribe to our newsletter for the latest sci-tech news ...

Contrails form when hot exhaust gas from an aircraft’s engine mixes with the cold air at an altitude of about 10 kilometres. In dry air, most contrails dissipate quickly. In cold, humid air, however, ...

Four research figures show how contrails appear in two satellite views (left) and two photographs taken from the MIT Green Building. Aviation’s climate impact is partly due to contrails — condensation ...

The National Academy of Sciences, Engineering, and Medicine will convene a committee to develop a national research agenda to understand better, quantify, and support the development of technical and ...