Basicaly, they can't make distinction between correlation and cause in the movie. Correlation is when 2 phenomenon act together but that neither affect the other. For example, when the Ganges goes up, criminality in New York follows, but there the real cause is that summer comes in new york and robbers act more during this season, where the rain comes at the same period of the year in India. Therefore, the real cause is the way the sun hit Earth, and the seasons that occurs.
In the movie, the self-called experts says that the Chemtrails cause the hole in the ozone layer (but in fact it's CFC and now a day's ozone layer's hole tend to diminish even though the experts says that there is more spraying now a days); that climate change is caused by chemtrails when it is demonstrated that global warming is to blame; that there is contamination variation from different metals (no investigation made if a manufacture or mine is nearby enough to put those particles in the air and with wind change, pollution variation); and the fact that airplanes goes through clouds, well yes they do because freight and passengers do fly in plane.
No answers is given as to who benefits from spraying (they argue mosanto but that isn't anybody; share holders would have to know (cause an expense line would be on the annual public report), and which plane would be used, cause to spray a large zone you need planes design to do it and store them somewhere. And if NSA wasn't able to keep secret the internet spy scheme for 7 years, how come no whistle blowers from the inside have spoken out about it? Come on, there is climate changes, there is global dimming, there was a hole in the ozone layer, but the cause isn't the chemtrails which just are the visible result of heating air and moisture in the higher atmosphere, point.
Stop loosing time on chemtrails and start looking for fiscal avoidance from the 1% which can be accomplished on a legal and personal basis that have evidence and law's that back it. Look at money repartition which considerably have change and concentrated in the hands of few in the last 35 year following deregulation on incomes taxes. These are real issues.