I saw a billboard that looked exactly like this:
The one I saw was while driving down near Brechin, Ontario, Canada which is a rather smaller area compared to Toronto. I can't believe there are advertisements for chemtrails now. Here I thought most people were still in the dark about it and shot it down as some conspiracy theory. There's actually billboard ads for this, I am absolutely amazed and glad. Hoping this leads to some actually change regarding this matter.