It's a truth universally acknowledged, that a lawn in possession of a good chemtrail is a lawn that's likely to be... well, not actually good.
But Steve's Theory of the Chemtrail Lawns says, "No, no, no, dear lawn-owners! The chemtrails are a sign, not a symptom!"
Apparently, the contrails left behind by planes are not just harmless water vapor, but are actually a plot to control our minds and bend the Earth's magnetic field to the will of the Illuminati.
Steve's evidence? A single, suspicious-looking contrail on the Johnson's lawn down the street. A conspiracy theorist's classic "aha!" moment.