If you track these subjects, the release of chemicals into the atmosphere by the military and other interests has been widely reported. I have stayed away from it because most of those reporting it do not have what I consider credibility. Kristen Meghan spent 9 years on active duty in the U.S. Air Force in Bioenvironmental Engineering, working in industrial hygiene and environmental protection. She separated honourably after fulfilling her enlistments, and blowing the whistle on unethical operations.
When the facts don’t add up & there is just a lot of speculation I find the knowledge & experience of those in their field can be most valuable. Well worth hearing what s said. “pilots explain Contrails-and the Chemtrail Hoax” page found on facebook.