My uncle's stories on chemtrails have me second-guessing plane trails.

In my experience, those white lines in the sky are just normal contrails from jets. He swears they're chemical sprays for weather control or something like that. I found official sources saying it's all ice crystals, but some folks point to strange cloud formations as proof. Take this with a grain of salt, but I'm stuck in the middle and want to know where you all stand.