I watched the documentary and it was interesting and most of what was shown I'd agree with . they have been trying to master the weather for decades it seems and spraying stuff about , and we are being poisoned and misinformed about our health & diet in many ways for financial profit , and this is probably why diseases like cancer and dementia , heart disease etc are on the increase .
However while I think vapour trails which under certain conditions remain and form cloud layers are obviously unnatural and must cut out the sun on an otherwise clear day and cause some effect, they are in themselves most likely a consequence of the big increase in air traffic since the last war.
I hadn't seen this thread before I posted on another section
https://forums.richieallen.co.uk/showthread.php?tid=43 you can check the identity of most planes that leave these trails . and there are also days when you think there's no air traffic at all hardly , but if you look , under certain conditions there is no vapour trail whatsoever at many of the altitudes on these days. The plane is a tiny dot which you can barely see even if you're looking for it in a particular area of sky.