RE: Love The Clouds: Chemtrail Or Water Vapor

Yes that would be great Gems but exhaust from vehicles and planes does contain substances not beneficial to health if exposed for a long time. It did not say that in the second explanation I found!

Looking deeper I found this- it looks like the jet exhaust contains more than water and soot!

Exhaust from military vehicles and aircraft may also include known or suspected cancer-causing substances such as benzene, arsenic, and formaldehyde. The exhaust may also contain harmful pollutants that are frequent components of urban smog, such as nitrogen oxides.
source

I will add this to the post.