Serial Brain had done a decode say beneficial chem trails were being aerosolized .
Is Serial Brain Donal Trump?

possible I suppose

Simple chemical weapons were used sporadically throughout antiquity and into the Industrial age.[4] It was not until the 19th century that the modern conception of chemical warfare emerged, as various scientists and nations proposed the use of asphyxiating or poisonous gasses.

Nerve agents, sometimes also called nerve gases, are a class of organic chemicals that disrupt the mechanisms by which nerves transfer messages to organs. The disruption is caused by the blocking of acetylcholinesterase (AChE), an enzyme that catalyzes the breakdown of acetylcholine, a neurotransmitter. Nerve agents are acetylcholinesterase inhibitors used as poison.