The chemistry behind chemtrails, or more accurately, contrails, for condensation trails.
From Reactions:
This week Reactions is taking science to the skies and checking out the chemistry behind chemtrails, or more accurately, contrails.
It’s easy to look at the white trail behind a jet aircraft and imagine all manner of chemicals raining down from above. However, airplane contrails are simply what happens when the chemistry of burning jet fuel meets the chemistry of air. In this video, Reactions explains the straightforward chemistry of contrails