I didn't find this documentary convincing at all when I watched it a while ago. There's no evidence presented that anything is being spayed other than some alleged chemical tests of water and soil. But we have no idea how the water and soil got that way, whether it's from airplane spraying, ground spraying, contaminants in airplane fuels, nearby factories emitting things into the air or water, contaminants from household water supplies, problems with the collection method, problems with the testing method or anything else.

And of course they just repeat the claim that contrails always disappear very quickly as though that is proof of anything, even though this is obviously false because clouds are made of the same stuff (water vapor) and don't disappear quickly.