A trail(s) containing chemical and metal particulates.
Modern usage refers to man-made trails in the atmosphere left by aircraft, however there are a variety of known methods used to disperse atmospheric chemical trails e.g. rockets, ground-based deployment technologies, ships.
Chemtrails can contain metal and chemical particulates including: Sulfur, Carbon Black. Aromatics, Aluminium etc. Such substances cause/contribute to aviation induced cloudiness and are often referred to as ‘Cloud Condensation Nuclei’ or CCN’s.
The word ‘chemtrails’ is often used interchangeably with and/or in relation to: Weather Modification, Cloud Seeding, Geoengineering, Solar Radiation Management (SRM), Stratospheric Aerosol Injection (SAI), Climate Engineering, Persistent Contrails, Aviation Induced Cloudiness, Marine Cloud Brightening (MCB), Sky Whitening, Weather Modification, Man-Made Clouds.
For more information on the subject of Chemtrails please see this free information booklet.
Further Reading: Chemtrails: The Taboo Word