Strange clouds, mostly created from "contrails"

The sky was split almost in half with thick dark clouds on one side and thin contrails on the other. I saw a few jets go by the clear area of the sky and leave huge contrails that quickly filled out like a blanket. I watched as the contrails became more solid eventually covering the entire sky.

Where do the natural clouds end and the contrails begin? Why do the contrails linger for so long? Why are they all in the same direction? Are they really spraying us with chemicals or is it all an illusion?

And if we are being sprayed, who are "they"? "They" live here too. So many questions. Video coming soon.