I didn't say it was impossible. This reminds me of something I've seen before on GLP though - the belief that a contrail that quickly dissipates and disappears is a natural contrail, and anything that lingers and spreads is a chemtrail. This is not true. I worked on compounds that were specially designed to disappear within minutes of deployment. I also worked on mixtures that, to achieve their desired effect, were unable to dissipate in such a short time span. Natural contrails can behave either way. So can chemtrails.