**TL;DR: Chemtrails are contrails left by aeroplanes** • Chemtrails are created by conspiracy theorists who believe that the trails left by planes are in fact governments or higher powers ordering the release of chemicals into the air for various purposes. These range from weather manipulation to mind control. • Contrails are in fact a type of [cloud called cirrus] (https://www.faa.gov/about/office_org/headquarters_offices/apl/noise_emissions/contrails/). They are formed when the water vapour in exhaust fumes condenses and freezes. The thickness and size of the contrail [depends on the altitude and temperature]( https://www.scientificamerican.com/article/why-do-jets-leave-a-white/#:~:text=Jets%20leave%20white%20trails%2C%20or,temperature%20than%20the%20exhaust%20gas). that the plane is flying through.

Chem trails are real, look up and you can see them. You seriously need to define what you are asking