This picture reveals the characteristic of almost all chemtrails: they are in the shape of X's
Chemtrails are just like normal plane contrails except that they are toxic. Chemtrails, short for chemical trails, is supposively a government plan to reduce the world's population. They can make people very ill and cause diseases such as pnuemonia, mental confusion, and depression.
However, it is unkown if they actually exist, or just another modern day hoax designed to scare people[link]
source from :Immortal-Sun: and [link]