Watch 'what/why in the world are they spraying?' instead. the fact is that prominent figures in science such as david keith of harvard university have already admitted to being able to 'geoengineer' the weather. what that means is using sprayed particulates of things such as aluminium, barium, lithium, and many other dangerous free-form oxide metals. This information is outlined in USAF training manuals as well as the above mentioned documentary. the fact is that global warming, climate change, or by any other name is now and most likely has always been the agenda to control the weather known as 'chemtrails' to some and weather modification to the rest because that is what it really is.