You're right on all of those.. No one is using chemtrails for what the conspiracy theorists say... to dump stuff on the population. However, they are purposely dumping stuff on the skies for cloud seeding, and "weather modification", and there is plenty of disclosure about that. So when a normal Boeing 747 Jet full of passengers crosses the sky, their contrail disappears after about 20 minutes. When you have a weather modification jet pass by, its chemtrail (as we call it) is stagnant for 2 to 6 hours after it flies by. That's what people are now noticing. We didn't notice this 20-30 years ago. But it's quite obvious now.

..and some of it is military classified. Reasons for that, are still classified. But still a training exercise for reasons that you might be interested to know "oops, are classified"