Modern Chemtrails: Molybdenum Arsenide?

Chem trails come in different varieties and flavors. Older chemtrails would stay visible in the air for a long time, and some modern ones still do, but some dissipate rather quickly, so as to appear similar to a vapor trail. Vapor trails are made of steam resulting from the combustion of engine fools. Chemtrails on the other hand are made up of various and diverse mixture of whatever chemicals or ingredients they happen to be spraying on that particular day, and can even be biological aerosols.